Universe
(a) Big Crunch
(b) Astronomy
(c) Cosmos ✅
(d) Supernova
Explanation: "Cosmos" is a synonym for universe, derived from Greek meaning "order" or "harmony".
Q2. The branch of science that studies the origin and fate of the universe is called:
(a) Geology
(b) Cosmology ✅
(c) Astrology
(d) Astronomy
Explanation: Cosmology is the scientific study of the origin, structure, and fate of the universe.
Q3. The universe is estimated to be approximately how old?
(a) 4.5 billion years
(b) 10 billion years
(c) 13.8 billion years ✅
(d) 20 billion years
Explanation: Current cosmological evidence suggests the universe is ~13.8 billion years old.
Q4. The term "Big Bang" was coined by:
(a) Edwin Hubble
(b) Fred Hoyle ✅
(c) Albert Einstein
(d) George Gamow
Explanation: Fred Hoyle coined the term “Big Bang” ironically while supporting the steady state theory.
Q5. The observable universe extends roughly:
(a) 46 million light years
(b) 460 million light years
(c) 46 billion light years ✅
(d) 460 billion light years
Explanation: The observable universe is about 46 billion light years in radius.
Q6. The speed of light in vacuum is:
(a) 1,00,000 km/s
(b) 3,00,000 km/s ✅
(c) 30,000 km/s
(d) 1,000 km/s
Explanation: Light travels at ~300,000 km/s, the cosmic speed limit.
Q7. The universe is primarily composed of:
(a) Stars and planets
(b) Dark matter and dark energy ✅
(c) Galaxies only
(d) Solar systems
Explanation: ~95% of the universe is dark matter and dark energy.
Q8. The cosmic microwave background radiation was discovered in:
(a) 1929
(b) 1965 ✅
(c) 1975
(d) 1985
Explanation: Discovered by Penzias and Wilson in 1965, evidence for the Big Bang.
Q9. The universe is expanding due to:
(a) Gravity
(b) Dark energy ✅
(c) Nuclear fusion
(d) Magnetism
Explanation: Dark energy drives accelerated expansion of the universe.
Q10. The study of celestial objects beyond Earth’s atmosphere is called:
(a) Astrology
(b) Astronomy ✅
(c) Cosmology
(d) Geophysics
Explanation: Astronomy is the scientific study of stars, planets, and galaxies.
Q11. The Big Bang theory explains:
(a) Formation of Earth
(b) Origin of Universe ✅
(c) Movement of planets
(d) Solar system evolution
Explanation: Big Bang theory describes the origin of the universe ~13.8 billion years ago.
Q12. The steady state theory was proposed in:
(a) 1929
(b) 1948 ✅
(c) 1965
(d) 1970
Explanation: Proposed by Bondi, Gold, and Hoyle in 1948.
Q13. The nebular hypothesis was first proposed by:
(a) Laplace ✅
(b) Copernicus
(c) Newton
(d) Galileo
Explanation: Pierre-Simon Laplace proposed the nebular hypothesis for solar system formation.
Q14. Who discovered the expansion of the universe?
(a) Albert Einstein
(b) Edwin Hubble ✅
(c) Fred Hoyle
(d) Isaac Newton
Explanation: Edwin Hubble observed redshift in galaxies, proving expansion.
Q15. The Big Crunch theory suggests:
(a) Universe will expand forever
(b) Universe will collapse back ✅
(c) Universe will remain steady
(d) Universe will freeze
Explanation: Big Crunch predicts eventual collapse due to gravity.
Q16. The inflationary model of the universe was proposed by:
(a) Alan Guth ✅
(b) Fred Hoyle
(c) George Gamow
(d) Edwin Hubble
Explanation: Alan Guth proposed inflation to explain uniformity of cosmic background.
Q17. The cyclic model of universe suggests:
(a) Universe expands and collapses repeatedly ✅
(b) Universe expands forever
(c) Universe is static
(d) Universe is shrinking
Explanation: Cyclic model proposes repeated Big Bang and Big Crunch cycles.
Q18. The multiverse theory suggests:
(a) Only one universe exists
(b) Many universes exist ✅
(c) Universe is static
(d) Universe is shrinking
Explanation: Multiverse theory proposes existence of multiple universes.
Q19. The Big Bang was supported by discovery of:
(a) Black holes
(b) Cosmic microwave background ✅
(c) Solar nebula
(d) Quasars
Explanation: CMB radiation is strong evidence for Big Bang.
Q20. The steady state theory failed due to:
(a) Lack of evidence ✅
(b) Discovery of galaxies
(c) Discovery of planets
(d) Discovery of stars
Explanation: Observations like CMB disproved steady state theory.
Q21. Which scientist proposed the nebular hypothesis modification in 1950?
(a) George Gamow
(b) Otto Schmidt ✅
(c) Copernicus
(d) Edwin Hubble
Explanation: Otto Schmidt suggested the Sun is surrounded by a solar nebula of hydrogen, helium, and dust.
Q22. The observable universe is mostly made up of:
(a) Stars
(b) Galaxies
(c) Dark energy ✅
(d) Planets
Explanation: Dark energy accounts for ~70% of the universe’s composition.
Q23. The discovery of redshift in galaxies was made by:
(a) Newton
(b) Einstein
(c) Hubble ✅
(d) Hoyle
Explanation: Edwin Hubble observed redshift, proving the universe is expanding.
Q24. The Big Bang theory was strongly supported by:
(a) Discovery of Pluto
(b) Cosmic microwave background ✅
(c) Discovery of Uranus
(d) Solar eclipse
Explanation: CMB radiation discovered in 1965 confirmed the Big Bang.
Q25. The term "Cosmology" was first used by:
(a) Thomas Blount ✅
(b) Isaac Newton
(c) Galileo
(d) Copernicus
Explanation: Thomas Blount used the term in 1656 to describe study of the universe.
Q26. The steady state theory was proposed by:
(a) Bondi, Gold, Hoyle ✅
(b) Einstein
(c) Newton
(d) Galileo
Explanation: Proposed in 1948, it suggested continuous creation of matter.
Q27. The Big Crunch theory predicts:
(a) Universe will collapse back ✅
(b) Universe will expand forever
(c) Universe is static
(d) Universe will freeze
Explanation: Big Crunch suggests gravity may reverse expansion.
Q28. The inflationary model was proposed by:
(a) Alan Guth ✅
(b) Fred Hoyle
(c) George Gamow
(d) Edwin Hubble
Explanation: Alan Guth proposed inflation to explain uniformity of cosmic background.
Q29. The cyclic model of universe suggests:
(a) Universe expands and collapses repeatedly ✅
(b) Universe expands forever
(c) Universe is static
(d) Universe is shrinking
Explanation: Cyclic model proposes repeated Big Bang and Big Crunch cycles.
Q30. The multiverse theory suggests:
(a) Only one universe exists
(b) Many universes exist ✅
(c) Universe is static
(d) Universe is shrinking
Explanation: Multiverse theory proposes existence of multiple universes.
Q31. The Big Bang was supported by discovery of:
(a) Black holes
(b) Cosmic microwave background ✅
(c) Solar nebula
(d) Quasars
Explanation: CMB radiation is strong evidence for Big Bang.
Q32. The steady state theory failed due to:
(a) Lack of evidence ✅
(b) Discovery of galaxies
(c) Discovery of planets
(d) Discovery of stars
Explanation: Observations like CMB disproved steady state theory.
Q33. The Big Bang occurred approximately:
(a) 4.5 billion years ago
(b) 10 billion years ago
(c) 13.8 billion years ago ✅
(d) 20 billion years ago
Explanation: Universe originated ~13.8 billion years ago.
Q34. The oscillating universe theory suggests:
(a) Universe expands and contracts cyclically ✅
(b) Universe expands forever
(c) Universe is static
(d) Universe shrinks continuously
Explanation: Oscillating theory combines expansion and contraction phases.
Q35. The quantum cosmology approach studies:
(a) Planets
(b) Universe using quantum mechanics ✅
(c) Solar system
(d) Galaxies only
Explanation: Quantum cosmology applies quantum theory to universe origin.
Q36. The Big Bang theory was first mathematically supported by:
(a) Einstein
(b) Georges Lemaître ✅
(c) Newton
(d) Galileo
Explanation: Lemaître proposed expanding universe model in 1927.
Q37. The steady state theory required:
(a) Continuous creation of matter ✅
(b) Collapse of stars
(c) Expansion of galaxies
(d) Destruction of planets
Explanation: Matter creation was needed to maintain constant density.
Q38. The inflationary model explains:
(a) Uniformity of cosmic microwave background ✅
(b) Formation of planets
(c) Solar system evolution
(d) Galaxy rotation
Explanation: Inflation explains homogeneity of universe.
Q39. The Big Bang theory was opposed by:
(a) Fred Hoyle ✅
(b) Edwin Hubble
(c) Newton
(d) Galileo
Explanation: Hoyle supported steady state theory instead.
Q40. The cyclic model is also known as:
(a) Oscillating universe ✅
(b) Expanding universe
(c) Static universe
(d) Shrinking universe
Explanation: Cyclic model is another name for oscillating universe.
Q41. The Big Bang theory was confirmed by:
(a) Discovery of Pluto
(b) Cosmic microwave background ✅
(c) Solar eclipse
(d) Discovery of Uranus
Explanation: CMB radiation discovery confirmed Big Bang.
Q42. The steady state theory was popular until:
(a) 1965 ✅
(b) 1929
(c) 1975
(d) 1985
Explanation: Discovery of CMB in 1965 disproved steady state theory.
Q43. The inflationary model was proposed in:
(a) 1981 ✅
(b) 1948
(c) 1965
(d) 1929
Explanation: Alan Guth proposed inflation in 1981.
Q44. The cyclic model was revived by:
(a) String theory ✅
(b) Newtonian mechanics
(c) Einstein’s relativity
(d) Copernican theory
Explanation: String theory revived cyclic universe ideas.
Q45. The multiverse theory is supported by:
(a) Quantum mechanics ✅
(b) Classical mechanics
(c) Newtonian physics
(d) Astrology
Explanation: Quantum mechanics suggests multiple universes.
Q46. The Big Bang theory was first suggested by:
(a) Georges Lemaître ✅
(b) Edwin Hubble
(c) Fred Hoyle
(d) Isaac Newton
Explanation: Lemaître suggested universe expansion in 1927.
Q47. The steady state theory was developed by:
(a) Bondi, Gold, Hoyle ✅
(b) Einstein
(c) Newton
(d) Galileo
Explanation: Trio developed steady state theory in 1948.
Q48. The inflationary model solved:
(a) Horizon problem ✅
(b) Solar system formation
(c) Galaxy rotation
(d) Planetary motion
Explanation: Inflation solved horizon problem in cosmology.
Q49. The cyclic model suggests:
(a) Universe repeats expansion and contraction ✅
(b) Universe expands forever
(c) Universe is static
(d) Universe shrinks continuously
Explanation: Cyclic model proposes repeated cycles.
Q50. The Big Bang theory is the most accepted model because:
(a) Supported by CMB and redshift ✅
(b) Supported by astrology
(c) Supported by mythology
(d) Supported by astrology and myths
Explanation: Evidence like CMB and galaxy redshift supports Big Bang.
Q51. The galaxy in which our solar system is located is:
(a) Andromeda
(b) Milky Way ✅
(c) IC 1101
(d) Triangulum
Explanation: The Milky Way galaxy contains our solar system.
Q52. The largest known galaxy is:
(a) Milky Way
(b) IC 1101 ✅
(c) Andromeda
(d) Sombrero
Explanation: IC 1101 is a supergiant elliptical galaxy, one of the largest known.
Q53. The nearest major galaxy to the Milky Way is:
(a) Triangulum
(b) Andromeda ✅
(c) IC 1101
(d) Virgo
Explanation: Andromeda (M31) is the closest spiral galaxy to the Milky Way.
Q54. The Milky Way is classified as a:
(a) Elliptical galaxy
(b) Spiral galaxy ✅
(c) Irregular galaxy
(d) Lenticular galaxy
Explanation: The Milky Way is a barred spiral galaxy.
Q55. The Virgo cluster is a collection of:
(a) Stars
(b) Galaxies ✅
(c) Planets
(d) Nebulae
Explanation: The Virgo cluster contains thousands of galaxies.
Q56. The center of the Milky Way contains:
(a) A neutron star
(b) A supermassive black hole ✅
(c) A pulsar
(d) A white dwarf
Explanation: Sagittarius A* is a supermassive black hole at the Milky Way’s center.
Q57. The Andromeda galaxy will collide with the Milky Way in approximately:
(a) 1 billion years
(b) 4 billion years ✅
(c) 10 billion years
(d) 20 billion years
Explanation: Andromeda and Milky Way are expected to merge in ~4 billion years.
Q58. Galaxies are classified into how many main types?
(a) Two
(b) Three ✅
(c) Four
(d) Five
Explanation: Galaxies are classified as spiral, elliptical, and irregular.
Q59. Quasars are:
(a) Planets
(b) Extremely luminous active galactic nuclei ✅
(c) Stars
(d) Nebulae
Explanation: Quasars are powered by supermassive black holes.
Q60. The Sombrero galaxy is located in:
(a) Virgo constellation ✅
(b) Orion constellation
(c) Ursa Major
(d) Centaurus
Explanation: The Sombrero galaxy (M104) lies in Virgo.
Q61. The brightest star in the night sky is:
(a) Betelgeuse
(b) Sirius ✅
(c) Proxima Centauri
(d) Vega
Explanation: Sirius, in Canis Major, is the brightest star visible from Earth.
Q62. The closest star to Earth (after the Sun) is:
(a) Sirius
(b) Proxima Centauri ✅
(c) Vega
(d) Barnard’s Star
Explanation: Proxima Centauri is ~4.24 light years away.
Q63. The color of a star indicates its:
(a) Age
(b) Temperature ✅
(c) Distance
(d) Size
Explanation: Blue stars are hotter, red stars are cooler.
Q64. A star’s brightness as seen from Earth is called:
(a) Absolute magnitude
(b) Apparent magnitude ✅
(c) Luminosity
(d) Radiance
Explanation: Apparent magnitude measures brightness as observed from Earth.
Q65. A star’s true brightness is measured by:
(a) Apparent magnitude
(b) Absolute magnitude ✅
(c) Luminosity only
(d) Radiance
Explanation: Absolute magnitude measures intrinsic brightness.
Q66. The Sun is classified as a:
(a) Red giant
(b) Yellow dwarf ✅
(c) White dwarf
(d) Neutron star
Explanation: The Sun is a G-type main-sequence star (yellow dwarf).
Q67. Stars end their life as:
(a) Black holes
(b) White dwarfs, neutron stars, or black holes ✅
(c) Pulsars only
(d) Supernova only
Explanation: Fate depends on mass; massive stars form black holes, smaller stars form white dwarfs.
Q68. A supernova is:
(a) Birth of a star
(b) Explosion of a star ✅
(c) Collapse of a galaxy
(d) Formation of a planet
Explanation: Supernova is a powerful explosion marking the end of a star’s life.
Q69. Neutron stars are formed from:
(a) Collapse of massive stars ✅
(b) Formation of galaxies
(c) Explosion of planets
(d) Fusion in Sun
Explanation: Neutron stars form after supernova collapse of massive stars.
Q70. Black holes are regions where:
(a) Gravity is weak
(b) Gravity is so strong that not even light escapes ✅
(c) Stars are born
(d) Galaxies collide
Explanation: Black holes trap everything, including light.
Q71. The star Betelgeuse is located in:
(a) Orion constellation ✅
(b) Ursa Major
(c) Virgo
(d) Centaurus
Explanation: Betelgeuse is a red supergiant in Orion.
Q72. Vega is part of which constellation?
(a) Lyra ✅
(b) Orion
(c) Ursa Major
(d) Centaurus
Explanation: Vega is the brightest star in Lyra.
Q73. Barnard’s Star is notable for being:
(a) The brightest star
(b) The fastest moving star ✅
(c) The largest star
(d) The hottest star
Explanation: Barnard’s Star has the highest proper motion.
Q74. The Hertzsprung-Russell diagram plots:
(a) Star temperature vs. luminosity ✅
(b) Galaxy size vs. distance
(c) Planet mass vs. orbit
(d) Black hole mass vs. spin
Explanation: HR diagram shows stellar classification.
Q75. Pulsars are:
(a) Rotating neutron stars emitting beams of radiation ✅
(b) Black holes
(c) White dwarfs
(d) Galaxies
Explanation: Pulsars emit regular pulses of radio waves.
Q76. The Sun’s energy is produced by:
(a) Nuclear fission
(b) Nuclear fusion ✅
(c) Chemical reactions
(d) Magnetism
Explanation: Fusion of hydrogen into helium powers the Sun.
Q77. The lifetime of the Sun is estimated to be:
(a) 1 billion years
(b) 5 billion years more ✅
(c) 10 billion years more
(d) 20 billion years
Explanation: The Sun has ~5 billion years left before becoming a red giant.
Q78. The Chandrasekhar limit defines:
(a) Maximum mass of a white dwarf ✅
(b) Minimum mass of a neutron star
(c) Size of galaxies
(d) Expansion rate of universe
Explanation: White dwarfs cannot exceed ~1.4 solar masses.
Q79. The Crab Nebula is the remnant of a:
(a) Supernova ✅
(b) Black hole
(c) Galaxy
(d) Pulsar
Explanation: Crab Nebula is the remnant of a supernova observed in 1054 AD.
Q80. The Sun belongs to which spectral class?
(a) O
(b) G ✅
(c) M
(d) B
Explanation: The Sun is a G2V star.
Q81. The hottest stars are of spectral type:
(a) O ✅
(b) B
(c) G
(d) M
Explanation: O-type stars are the hottest and most massive.
Q82. The coolest stars are of spectral type:
(a) O
(b) B
(c) G
(d) M ✅
Explanation: M-type stars are red and coolest.
Q83. Sirius is also known as:
(a) Dog Star ✅
(b) Pole Star
(c) Red Giant
(d) Morning Star
Explanation: Sirius is called the Dog Star in Canis Major.
Q84. Polaris is important because:
(a) It is the brightest star
(b) It indicates the North direction ✅
(c) It is the hottest star
(d) It is the closest star
Explanation: Polaris (North Star) is used for navigation.
Q85. The Sun’s core temperature is approximately:
(a) 1 million °C
(b) 15 million °C ✅
(c) 100 million °C
(d) 500,000 °C
Explanation: The Sun’s core reaches ~15 million °C.
Q86. The Sun’s outer atmosphere is called:
(a) Corona ✅
(b) Photosphere
(c) Chromosphere
(d) Mantle
Explanation: Corona is the outermost layer of the Sun’s atmosphere.
Q87. Solar flares are caused by:
(a) Magnetic activity ✅
(b) Nuclear fusion
(c) Gravity
(d) Rotation
Explanation: Solar flares result from magnetic disturbances.
Q88. Sunspots appear dark because:
(a) They are cooler than surrounding areas ✅
(b) They are hotter
(c) They are larger
(d) They are brighter
Explanation: Sunspots are cooler regions on the Sun’s surface.
Q89. The solar wind is composed of:
(a) Photons
(b) Charged particles ✅
(c) Neutrons
(d) Dust
Explanation: Solar wind consists of protons and electrons.
Q90. The nearest star cluster to Earth is:
(a) Pleiades
(b) Hyades ✅
(c) Omega Centauri
(d) Hercules Cluster
Explanation: The Hyades cluster in Taurus is the closest open star cluster to Earth, about 153 light years away.
Q91. The Pleiades star cluster is also known as:
(a) Seven Sisters ✅
(b) Big Dipper
(c) Orion’s Belt
(d) Dog Star
Explanation: The Pleiades is an open cluster of stars in Taurus, popularly called the Seven Sisters.
Q92. Globular clusters are:
(a) Groups of planets
(b) Dense spherical collections of stars ✅
(c) Galaxies
(d) Nebulae
Explanation: Globular clusters contain hundreds of thousands of stars bound by gravity.
Q93. The brightest star in the constellation Orion is:
(a) Rigel ✅
(b) Betelgeuse
(c) Bellatrix
(d) Saiph
Explanation: Rigel is a blue supergiant and the brightest star in Orion.
Q94. Betelgeuse is classified as a:
(a) Blue giant
(b) Red supergiant ✅
(c) White dwarf
(d) Neutron star
Explanation: Betelgeuse is a red supergiant star nearing the end of its life.
Q95. The star Altair belongs to which constellation?
(a) Lyra
(b) Aquila ✅
(c) Orion
(d) Centaurus
Explanation: Altair is the brightest star in the constellation Aquila.
Q96. The brightest star in the constellation Lyra is:
(a) Vega ✅
(b) Altair
(c) Deneb
(d) Rigel
Explanation: Vega is the brightest star in Lyra and one of the most luminous nearby stars.
Q97. Deneb is part of which asterism?
(a) Summer Triangle ✅
(b) Orion’s Belt
(c) Big Dipper
(d) Pleiades
Explanation: Deneb, Vega, and Altair form the Summer Triangle asterism.
Q98. The nearest known white dwarf to Earth is:
(a) Sirius B ✅
(b) Proxima Centauri
(c) Vega
(d) Rigel
Explanation: Sirius B is a white dwarf companion to Sirius, located about 8.6 light years away.
Q99. The nearest known neutron star to Earth is:
(a) RX J1856.5-3754 ✅
(b) Crab Pulsar
(c) Vela Pulsar
(d) Geminga
Explanation: RX J1856.5-3754 is the closest known neutron star, about 400 light years away.
Q100. The Crab Pulsar is located in:
(a) Crab Nebula ✅
(b) Orion Nebula
(c) Andromeda Galaxy
(d) Virgo Cluster
Explanation: The Crab Pulsar is a rapidly rotating neutron star in the Crab Nebula, formed from a supernova in 1054 AD.
Q101. The constellation ‘Sapta Rishi’ is known in the West as:
(a) Seven Monks
(b) Alpha Centauri
(c) Big Dipper ✅
(d) Small Bear
Explanation: Sapta Rishi corresponds to the Big Dipper, part of Ursa Major.
Q102. The constellation Orion is also called:
(a) The Hunter ✅
(b) The Archer
(c) The Bear
(d) The Dog
Explanation: Orion is known as The Hunter, easily identified by Orion’s Belt.
Q103. Polaris is located in which constellation?
(a) Ursa Minor ✅
(b) Ursa Major
(c) Orion
(d) Lyra
Explanation: Polaris, the North Star, is part of Ursa Minor.
Q104. The Southern Cross constellation is visible from:
(a) Northern Hemisphere
(b) Southern Hemisphere ✅
(c) Equator only
(d) Arctic region
Explanation: The Southern Cross is a prominent constellation in the Southern Hemisphere.
Q105. The constellation Cassiopeia is shaped like:
(a) A W or M ✅
(b) A triangle
(c) A square
(d) A circle
Explanation: Cassiopeia is easily recognized by its W/M shape.
Q106. The constellation Leo represents:
(a) A Lion ✅
(b) A Dog
(c) A Horse
(d) A Bull
Explanation: Leo is symbolized as a lion in the zodiac.
Q107. The constellation Taurus represents:
(a) A Bull ✅
(b) A Ram
(c) A Fish
(d) A Bird
Explanation: Taurus is symbolized as a bull in the zodiac.
Q108. The constellation Gemini represents:
(a) Twins ✅
(b) Hunters
(c) Bears
(d) Lions
Explanation: Gemini is symbolized as twins Castor and Pollux.
Q109. The constellation Scorpius represents:
(a) A Scorpion ✅
(b) A Snake
(c) A Dragon
(d) A Fish
Explanation: Scorpius is symbolized as a scorpion in the zodiac.
Q110. The constellation Sagittarius represents:
(a) An Archer ✅
(b) A Hunter
(c) A Lion
(d) A Dog
Explanation: Sagittarius is symbolized as an archer.
Q111. The constellation Aquarius represents:
(a) Water Bearer ✅
(b) Fire
(c) Earth
(d) Air
Explanation: Aquarius is symbolized as the water bearer.
Q112. The constellation Capricorn represents:
(a) Sea Goat ✅
(b) Bull
(c) Lion
(d) Dog
Explanation: Capricorn is symbolized as a sea goat.
Q113. The constellation Aries represents:
(a) Ram ✅
(b) Bull
(c) Goat
(d) Lion
Explanation: Aries is symbolized as a ram.
Q114. The constellation Pisces represents:
(a) Two Fish ✅
(b) Two Lions
(c) Two Dogs
(d) Two Bears
Explanation: Pisces is symbolized as two fish.
Q115. The constellation Virgo represents:
(a) Maiden ✅
(b) Lion
(c) Bull
(d) Goat
Explanation: Virgo is symbolized as a maiden.
Q116. The constellation Libra represents:
(a) Scales ✅
(b) Sword
(c) Bow
(d) Shield
Explanation: Libra is symbolized as scales of justice.
Q117. The constellation Cancer represents:
(a) Crab ✅
(b) Fish
(c) Dog
(d) Lion
Explanation: Cancer is symbolized as a crab.
Q118. The constellation Ophiuchus represents:
(a) Serpent Bearer ✅
(b) Hunter
(c) Archer
(d) Lion
Explanation: Ophiuchus is symbolized as the serpent bearer.
Q119. The constellation Centaurus contains:
(a) Alpha Centauri ✅
(b) Sirius
(c) Vega
(d) Rigel
Explanation: Alpha Centauri, the closest star system, lies in Centaurus.
Q120. The constellation Lyra contains:
(a) Vega ✅
(b) Sirius
(c) Rigel
(d) Betelgeuse
Explanation: Vega is the brightest star in Lyra.
Q121. A light year measures:
(a) Time
(b) Distance ✅
(c) Speed
(d) Brightness
Explanation: A light year is the distance light travels in one year (~9.46 trillion km).
Q122. A parsec is equal to:
(a) 3.26 light years ✅
(b) 1 light year
(c) 10 light years
(d) 100 light years
Explanation: One parsec equals 3.26 light years.
Q123. Redshift in galaxies indicates:
(a) Galaxies are approaching
(b) Galaxies are receding ✅
(c) Galaxies are static
(d) Galaxies are rotating
Explanation: Redshift shows galaxies moving away due to expansion.
Q124. Hubble’s Law relates:
(a) Distance and velocity of galaxies ✅
(b) Mass and size of stars
(c) Temperature and brightness of stars
(d) Age and size of planets
Explanation: Hubble’s Law states galaxies recede faster the farther they are.
Q125. The cosmic microwave background radiation is evidence of:
(a) Steady state theory
(b) Big Bang theory ✅
(c) Nebular hypothesis
(d) Multiverse theory
Explanation: CMB supports the Big Bang origin of the universe.
Q126. The unit used to measure stellar brightness is:
(a) Magnitude ✅
(b) Kelvin
(c) Joule
(d) Watt
Explanation: Magnitude scale measures star brightness.
Q127. The apparent magnitude of a star depends on:
(a) Distance from Earth ✅
(b) Intrinsic brightness only
(c) Age of star
(d) Temperature only
Explanation: Apparent magnitude is brightness as seen from Earth.
Q128. The absolute magnitude of a star is:
(a) Brightness at 10 parsecs ✅
(b) Brightness at Earth
(c) Brightness at Sun’s distance
(d) Brightness at infinity
Explanation: Absolute magnitude is intrinsic brightness at 10 parsecs.
Q129. The cosmic expansion rate is measured by:
(a) Hubble constant ✅
(b) Boltzmann constant
(c) Planck constant
(d) Stefan constant
Explanation: Hubble constant measures universe expansion rate.
Q130. The cosmic microwave background temperature is approximately:
(a) 2.7 Kelvin ✅
(b) 10 Kelvin
(c) 100 Kelvin
(d) 273 Kelvin
Explanation: CMB temperature is ~2.7 K.
Q131. The Doppler effect explains:
(a) Redshift and blueshift ✅
(b) Solar flares
(c) Planetary motion
(d) Star formation
Explanation: Doppler effect explains frequency changes due to motion.
Q132. The age of the universe is estimated using:
(a) Hubble constant ✅
(b) Boltzmann constant
(c) Solar constant
(d) Planck constant
Explanation: Hubble constant helps estimate universe age.
Q133. The cosmic horizon defines:
(a) Limit of observable universe ✅
(b) Limit of galaxies
(c) Limit of solar system
(d) Limit of stars
Explanation: Cosmic horizon is the maximum observable distance.
Q134. The cosmic microwave background was discovered by:
(a) Penzias and Wilson ✅
(b) Hubble
(c) Hoyle
(d) Einstein
Explanation: Penzias and Wilson discovered CMB in 1965.
Q135. The expansion of the universe was discovered by:
(a) Edwin Hubble ✅
(b) Einstein
(c) Hoyle
(d) Newton
Explanation: Hubble observed galaxy redshift proving expansion.
Q136. The Hubble Space Telescope was launched in:
(a) 1990 ✅
(b) 1980
(c) 2000
(d) 2010
Explanation: Hubble was launched in 1990 to study deep space.
Q137. The James Webb Space Telescope was launched in:
(a) 2021 ✅
(b) 2015
(c) 2010
(d) 2005
Explanation: JWST was launched in December 2021.
Q138. The Vera C. Rubin Observatory began operations in:
(a) 2025 ✅
(b) 2020
(c) 2010
(d) 2015
Explanation: Rubin Observatory started in 2025 to study dark matter and energy.
Q139. The cosmic microwave background provides evidence for:
(a) Big Bang ✅
(b) Steady state
(c) Nebular hypothesis
(d) Multiverse
Explanation: CMB supports Big Bang theory.
Q140. The Hubble constant is measured in:
(a) km/s per Mpc ✅
(b) m/s per km
(c) km/h per parsec
(d) light years per second
Explanation: Hubble constant is expressed in km/s/Mpc.
Q141. The Planck satellite studied:
(a) Cosmic microwave background ✅
(b) Solar system
(c) Galaxies only
(d) Stars only
Explanation: Planck satellite mapped CMB in detail.
Q142. The cosmic microwave background is uniform because of:
(a) Inflation ✅
(b) Gravity
(c) Magnetism
(d) Rotation
Explanation: Inflation explains uniformity of CMB.
Q143. The observable universe radius is approximately:
(a) 4.6 billion light years
(b) 46 billion light years ✅
(c) 460 million light years
(d) 460 billion light years
Explanation: The observable universe extends about 46 billion light years in radius.
Q144. The Hubble constant currently estimates the universe’s expansion rate at around:
(a) 10 km/s/Mpc
(b) 70 km/s/Mpc ✅
(c) 700 km/s/Mpc
(d) 7 km/s/Mpc
Explanation: The Hubble constant is ~70 km/s per megaparsec, though exact value is debated.
Q145. The cosmic microwave background radiation has a temperature of:
(a) 0 Kelvin
(b) 2.7 Kelvin ✅
(c) 27 Kelvin
(d) 270 Kelvin
Explanation: The CMB temperature is ~2.7 K, evidence of the Big Bang.
Q146. The Doppler effect in astronomy is used to measure:
(a) Star brightness
(b) Motion of celestial objects ✅
(c) Star age
(d) Planet size
Explanation: Doppler effect measures redshift and blueshift, indicating motion of stars and galaxies.
Q147. The unit “parsec” is equal to:
(a) 1 light year
(b) 3.26 light years ✅
(c) 10 light years
(d) 100 light years
Explanation: One parsec equals 3.26 light years.
Q148. The cosmic horizon defines:
(a) Limit of observable universe ✅
(b) Limit of solar system
(c) Limit of galaxies
(d) Limit of stars
Explanation: Cosmic horizon marks the maximum distance observable due to light travel time.
Q149. The Planck satellite was launched to study:
(a) Solar flares
(b) Cosmic microwave background ✅
(c) Planetary motion
(d) Galaxy rotation
Explanation: Planck mapped the CMB in detail, refining cosmological models.
Q150. The James Webb Space Telescope is designed to study:
(a) Exoplanets and early universe ✅
(b) Earth’s atmosphere
(c) Solar system only
(d) Ocean currents
Explanation: JWST focuses on exoplanets, galaxies, and the early universe formation.
Q151. In 2025, which telescope confirmed the earliest known supernova in the universe?
(a) Hubble
(b) James Webb ✅
(c) Spitzer
(d) Chandra
Explanation: JWST detected a gamma-ray burst supernova from 730 million years after the Big Bang.
Q152. The Vera C. Rubin Observatory began operations in:
(a) 2020
(b) 2025 ✅
(c) 2015
(d) 2010
Explanation: Rubin Observatory started in 2025 to study dark matter and dark energy.
Q153. The James Webb Space Telescope observed a feeding black hole in a galaxy only:
(a) 570 million years after Big Bang ✅
(b) 1 billion years after Big Bang
(c) 2 billion years after Big Bang
(d) 5 billion years after Big Bang
Explanation: JWST revealed an actively growing supermassive black hole in the early universe.
Q154. The Rubin Observatory’s main survey is called:
(a) LSST ✅
(b) CMB
(c) HST
(d) JWST
Explanation: The Legacy Survey of Space and Time (LSST) is Rubin’s flagship program.
Q155. The JWST is particularly designed to study:
(a) Infrared spectrum ✅
(b) Ultraviolet spectrum
(c) X-rays
(d) Gamma rays
Explanation: JWST observes in infrared to study early galaxies and exoplanets.
Q156. In 2025, astronomers highlighted breakthroughs in:
(a) Mapping galaxies ✅
(b) Ocean currents
(c) Earth’s atmosphere
(d) Volcanoes
Explanation: 2025 discoveries focused on galaxies, exoplanets, and cosmic expansion.
Q157. The Rubin Observatory is located in:
(a) Chile ✅
(b) USA
(c) India
(d) Australia
Explanation: Rubin is built on Cerro Pachón in Chile.
Q158. The JWST detected the earliest gamma-ray burst linked to:
(a) Supernova ✅
(b) Black hole merger
(c) Planet formation
(d) Solar flare
Explanation: JWST confirmed a gamma-ray burst from an early supernova.
Q159. The Rubin Observatory will help study:
(a) Dark matter and dark energy ✅
(b) Earth’s oceans
(c) Solar flares
(d) Volcanoes
Explanation: Rubin’s survey focuses on dark matter and dark energy.
Q160. The JWST was launched in:
(a) 2021 ✅
(b) 2015
(c) 2010
(d) 2005
Explanation: JWST launched in December 2021.
Q161. The Rubin Observatory’s LSST will run for:
(a) 10 years ✅
(b) 5 years
(c) 20 years
(d) 2 years
Explanation: LSST is planned as a 10-year survey.
Q162. The JWST has a primary mirror diameter of:
(a) 2.4 m
(b) 6.5 m ✅
(c) 10 m
(d) 12 m
Explanation: JWST’s 6.5 m mirror is much larger than Hubble’s.
Q163. The Rubin Observatory was formerly known as:
(a) LSST Observatory ✅
(b) Hubble
(c) Spitzer
(d) Chandra
Explanation: Rubin was originally called the LSST Observatory.
Q164. The JWST operates at the L2 point, located:
(a) 1.5 million km from Earth ✅
(b) 150,000 km from Earth
(c) 15 million km from Earth
(d) 15 km from Earth
Explanation: JWST orbits around the Sun-Earth L2 point.
Q165. The Rubin Observatory is named after:
(a) Vera Rubin ✅
(b) Edwin Hubble
(c) Carl Sagan
(d) Albert Einstein
Explanation: Vera Rubin pioneered dark matter research.
Q166. JWST’s first images were released in:
(a) July 2022 ✅
(b) January 2021
(c) December 2021
(d) March 2023
Explanation: JWST’s first deep field images were released in July 2022.
Q167. The Rubin Observatory’s LSST will generate data of:
(a) 20 terabytes per night ✅
(b) 2 terabytes per night
(c) 200 terabytes per night
(d) 200 gigabytes per night
Explanation: LSST will produce ~20 TB of data nightly.
Q168. JWST’s infrared capability allows study of:
(a) Early galaxies ✅
(b) Earth’s oceans
(c) Volcanoes
(d) Atmosphere only
Explanation: Infrared helps JWST see distant, early galaxies.
Q169. Rubin Observatory’s survey will cover:
(a) Entire visible sky ✅
(b) Only southern sky
(c) Only northern sky
(d) Only equatorial sky
Explanation: LSST will map nearly the entire visible sky.
Q170. JWST detected carbon dioxide in an exoplanet atmosphere in:
(a) 2022 ✅
(b) 2021
(c) 2023
(d) 2025
Explanation: JWST detected CO₂ in WASP-39b’s atmosphere in 2022.
Q171. Rubin Observatory’s LSST will help detect:
(a) Near-Earth asteroids ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track asteroids and comets.
Q172. JWST observed water vapor in an exoplanet atmosphere in:
(a) 2023 ✅
(b) 2021
(c) 2022
(d) 2025
Explanation: JWST detected water vapor in exoplanet atmospheres.
Q173. Rubin Observatory’s LSST will create:
(a) Largest astronomical catalog ✅
(b) Smallest catalog
(c) Ocean database
(d) Volcano database
Explanation: LSST will produce the largest sky catalog.
Q174. JWST observed galaxies formed only:
(a) 300 million years after Big Bang ✅
(b) 1 billion years after Big Bang
(c) 2 billion years after Big Bang
(d) 5 billion years after Big Bang
Explanation: JWST detected galaxies from 300 million years after Big Bang.
Q175. Rubin Observatory’s LSST will study:
(a) Transient events ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track transient cosmic events like supernovae.
Q176. JWST detected methane in an exoplanet atmosphere in:
(a) 2023 ✅
(b) 2021
(c) 2022
(d) 2025
Explanation: JWST detected methane in exoplanet atmospheres.
Q177. Rubin Observatory’s LSST will help refine:
(a) Cosmic expansion rate ✅
(b) Ocean currents
(c) Volcano activity
(d) Earth’s rotation
Explanation: LSST data will refine Hubble constant measurements.
Q178. JWST observed earliest black holes forming in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST revealed black holes forming in early galaxies in 2025.
Q179. Rubin Observatory’s LSST will aid in studying:
(a) Dark energy ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will provide data on dark energy.
Q180. JWST detected earliest star clusters in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST observed star clusters from the early universe in 2025.
Q181. Rubin Observatory’s LSST will monitor:
(a) Variable stars ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track variable stars across the sky.
Q182. JWST observed earliest galaxies merging in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST detected galaxy mergers in the early universe in 2025.
Q183. Rubin Observatory’s LSST will help discover:
(a) New dwarf galaxies ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will identify faint dwarf galaxies.
Q184. JWST detected earliest chemical elements in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST observed chemical signatures in early galaxies in 2025.
Q185. Rubin Observatory’s LSST will track:
(a) Supernovae ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will monitor supernova explosions.
Q186. JWST observed earliest cosmic dust in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST detected dust in early galaxies in 2025.
Q187. Rubin Observatory’s LSST will provide:
(a) 3D map of universe ✅
(b) 2D map of Earth
(c) Ocean map
(d) Volcano map
Explanation: LSST will generate a 3D cosmic map.
Q188. Rubin Observatory’s LSST will provide:
(a) 3D map of universe ✅
(b) 2D map of Earth
(c) Ocean map
(d) Volcano map
Explanation: LSST will generate a 3D cosmic map of billions of galaxies and stars.
Q189. JWST detected earliest galaxies merging in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST observed galaxy mergers in the early universe during 2025 studies.
Q190. Rubin Observatory’s LSST will help refine measurements of:
(a) Hubble constant ✅
(b) Solar constant
(c) Boltzmann constant
(d) Planck constant
Explanation: LSST data will improve accuracy of the Hubble constant and cosmic expansion rate.
Q191. JWST observed earliest black holes forming in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST revealed black holes forming in galaxies only a few hundred million years after Big Bang.
Q192. Rubin Observatory’s LSST will track:
(a) Supernovae ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will monitor transient cosmic events like supernova explosions.
Q193. JWST detected earliest star clusters in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST observed star clusters from the early universe in 2025.
Q194. Rubin Observatory’s LSST will aid in discovering:
(a) New dwarf galaxies ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will identify faint dwarf galaxies across the sky.
Q195. JWST observed earliest chemical elements in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST detected chemical signatures in early galaxies in 2025.
Q196. Rubin Observatory’s LSST will monitor:
(a) Variable stars ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track variable stars and their brightness changes.
Q197. JWST observed earliest cosmic dust in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST detected dust in early galaxies in 2025.
Q198. Rubin Observatory’s LSST will create:
(a) Largest astronomical catalog ✅
(b) Smallest catalog
(c) Ocean database
(d) Volcano database
Explanation: LSST will produce the largest sky catalog ever compiled.
Q199. JWST observed earliest galaxies formed only:
(a) 300 million years after Big Bang ✅
(b) 1 billion years after Big Bang
(c) 2 billion years after Big Bang
(d) 5 billion years after Big Bang
Explanation: JWST detected galaxies from 300 million years after Big Bang.
Q200. Rubin Observatory’s LSST will run for:
(a) 10 years ✅
(b) 5 years
(c) 20 years
(d) 2 years
Explanation: LSST is planned as a 10-year survey generating massive sky data.
Q201. In 2025, which telescope confirmed the earliest known supernova in the universe?
(a) Hubble
(b) James Webb ✅
(c) Spitzer
(d) Chandra
Explanation: JWST detected a gamma-ray burst supernova from 730 million years after the Big Bang.
Q202. In 2025, astronomers discovered the most distant galaxy named:
(a) IC 1101
(b) MoM-z14 ✅
(c) Andromeda
(d) Virgo
Explanation: MoM-z14 is the most distant galaxy observed, reshaping our understanding of early universe formation.
Q203. How many moons does Saturn have after the 2025 discoveries?
(a) 128
(b) 200
(c) 274 ✅
(d) 300
Explanation: Saturn’s moon count rose to 274 after 128 new moons were discovered in 2025.
Q204. In 2025, the number of confirmed exoplanets crossed:
(a) 1,000
(b) 3,000
(c) 6,000 ✅
(d) 10,000
Explanation: The exoplanet count surpassed 6,000 in 2025.
Q205. The Vera C. Rubin Observatory began operations in:
(a) 2020
(b) 2025 ✅
(c) 2015
(d) 2010
Explanation: Rubin Observatory started in 2025 to conduct the LSST survey of the sky.
Q206. JWST observed a feeding black hole in a galaxy only:
(a) 570 million years after Big Bang ✅
(b) 1 billion years after Big Bang
(c) 2 billion years after Big Bang
(d) 5 billion years after Big Bang
Explanation: JWST revealed an actively growing supermassive black hole in the early universe.
Q207. The Rubin Observatory’s LSST will generate data of:
(a) 20 terabytes per night ✅
(b) 2 terabytes per night
(c) 200 terabytes per night
(d) 200 gigabytes per night
Explanation: LSST will produce ~20 TB of data nightly.
Q208. JWST detected carbon dioxide in an exoplanet atmosphere in:
(a) 2022 ✅
(b) 2021
(c) 2023
(d) 2025
Explanation: JWST detected CO₂ in WASP-39b’s atmosphere in 2022.
Q209. Rubin Observatory’s LSST will help detect:
(a) Near-Earth asteroids ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track asteroids and comets.
Q210. JWST observed water vapor in an exoplanet atmosphere in:
(a) 2023 ✅
(b) 2021
(c) 2022
(d) 2025
Explanation: JWST detected water vapor in exoplanet atmospheres.
Q211. Rubin Observatory’s LSST will create:
(a) Largest astronomical catalog ✅
(b) Smallest catalog
(c) Ocean database
(d) Volcano database
Explanation: LSST will produce the largest sky catalog.
Q212. JWST observed galaxies formed only:
(a) 300 million years after Big Bang ✅
(b) 1 billion years after Big Bang
(c) 2 billion years after Big Bang
(d) 5 billion years after Big Bang
Explanation: JWST detected galaxies from 300 million years after Big Bang.
Q213. Rubin Observatory’s LSST will study:
(a) Transient events ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track transient cosmic events like supernovae.
Q214. JWST detected methane in an exoplanet atmosphere in:
(a) 2023 ✅
(b) 2021
(c) 2022
(d) 2025
Explanation: JWST detected methane in exoplanet atmospheres.
Q215. Rubin Observatory’s LSST will help refine:
(a) Cosmic expansion rate ✅
(b) Ocean currents
(c) Volcano activity
(d) Earth’s rotation
Explanation: LSST data will refine Hubble constant measurements.
Q216. JWST observed earliest black holes forming in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST revealed black holes forming in early galaxies in 2025.
Q217. Rubin Observatory’s LSST will aid in studying:
(a) Dark energy ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will provide data on dark energy.
Q218. JWST observed earliest star clusters in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST observed star clusters from the early universe in 2025.
Q219. Rubin Observatory’s LSST will monitor:
(a) Variable stars ✅
(b) Ocean currents
(c) Volcanoes
(d) Earthquakes
Explanation: LSST will track variable stars across the sky.
Q220. JWST observed earliest cosmic dust in:
(a) 2025 ✅
(b) 2020
(c) 2015
(d) 2010
Explanation: JWST detected dust in early galaxies in 2025.
Post a Comment
Post a Comment