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Universe mcq for UPSC Preliminary exam
Approximately how long does the Sun take to orbit the center of the Milky Way galaxy?
A) 2.5 crore years
B) 10 crore years
C) 25 crore years
D) 50 crore years
Option c – 25 crore years
What does the colour of a star signify?
A) Its distance from the Sun
B) Its brightness
C) Its distance from Earth
D) Its surface temperature
Option d – Its surface temperature
The Big Bang theory is associated with the
A) Movement of continents
B) Origin of the Universe
C) Formation of the Himalayas
D) Volcanic activity
Option b – Origin of the Universe
The Milky Way galaxy is categorized as a
A) Spiral galaxy
B) Electrical galaxy
C) Irregular galaxy
D) Round galaxy
Option a – Spiral galaxy
The Mass threshold beyond which a star collapses is known as
A) Chandrasekhar limit
B) Eddington limit
C) Hoyle limit
D) Fowler limit
Option a – Chandrasekhar limit
Which of the following phenomena is caused by stellar activity?
A) Ozone hole
B) Black hole
C) Rainbow
D) Comet
Option b – Black hole
Who proposed the concept of Black Holes?
A) C. V. Raman
B) H. J. Bhabha
C) S. Chandrasekhar
D) Hargovind Khurana
Option c – S. Chandrasekhar
A black hole does not emit radiation because of its
A) Very small size
B) Extremely large size
C) High density
D) Very low density
Option c – High density
Terms such as Event Horizon, Singularity, String Theory, and Standard Model are mainly associated with
A) Studying and understanding the Universe
B) Solar and lunar eclipse observations
C) Satellite placement around Earth
Option a – Studying and understanding the Universe
A Supernova refers to
A) An asteroid
B) A black hole
C) A comet
D) A dying star
Option d – A dying star
How many officially recognized constellations exist in the sky?
A) 87
B) 88
C) 89
D) 90
Option b – 88
Which of the following is not considered an astronomical object?
A) Pulsar
B) Brittle star
C) Black hole
D) Quasar
Option b – Brittle star
A group of stars forming a recognizable pattern is called a
A) Milky Way
B) Constellation
C) Andromeda
D) Solar System
Option b – Constellation
The Hubble Space Telescope captured detailed images of the surface of which star?
A) Virgo
B) 70 Virginis
C) Betelgeuse
D) Big Dipper
Option c – Betelgeuse
A ‘Light Year’ is a unit used to measure
A) Time
B) Distance
C) Brightness
D) None of these
Option b – Distance
Which of the following is not a natural measure of time?
A) Tropical year
B) Lunar month
C) Standard time
D) Day
Option c – Standard time
The standard unit used to measure distances between stars is
A) Stellar mile
B) Cosmic kilometre
C) Galactic unit
D) Light year
Option d – Light year
If stars appear to rise perpendicular to the horizon, the observer is positioned at
A) Equator
B) Tropic of Cancer
C) South Pole
D) North Pole
Option a – Equator
In a desert, a person wishes to travel 5 km east and locates the Pole Star. The best walking direction would be
A) Facing the Pole Star
B) Opposite to the Pole Star
C) Keeping the Pole Star on the left
D) Keeping the Pole Star on the right
Option c – Keeping the Pole Star on the left
The group of stars used to locate the celestial pole is
A) Saptarishi
B) Mrig
C) Scorpio
D) Taurus
Option a – Saptarishi
Which of the following is unrelated to space terminology?
A) Telemetering
B) Weightlessness
C) Cislunar
D) Byte
Option d – Byte
The astronomer who first demonstrated that the Earth revolves around the Sun was
A) Newton
B) Dalton
C) Copernicus
D) Einstein
Option c – Copernicus
Which of the following statements about the Solar system is correct?
A) Earth is the densest planet in the Solar system
B) Silicon is the primary element in Earth’s composition
C) The Sun contains 75% of the Mass of the Solar system
D) The diameter of the Sun is 190 times that of the Earth
Which planet takes the shortest time to complete one orbit around the Sun?
A) Mars
B) Mercury
C) Earth
D) Saturn
Option b – Mercury
Which two planets lack any natural satellites?
A) Earth and Jupiter
B) Mercury and Venus
C) Mercury and Saturn
D) Venus and Mars
Option b – Mercury and Venus
Identify the pair of planets that do not have moons.
A) Venus and Mars
B) Mercury and Mars
C) Earth and Jupiter
D) Mercury and Venus
Option d – Mercury and Venus
Which planet is popularly called the Morning Star?
A) Mercury
B) Venus
C) Mars
D) Saturn
Option b – Venus
Which planet is often referred to as Earth’s twin?
A) Mercury
B) Venus
C) Mars
D) Pluto
Option b – Venus
Which planet has the highest surface temperature in the Solar system?
A) Mercury
B) Venus
C) Mars
D) Earth
Option b – Venus
Which planet is known as the Evening Star?
A) Mars
B) Jupiter
C) Venus
D) Saturn
Option c – Venus
The Magellan spacecraft was launched to explore which planet?
A) Pluto
B) Saturn
C) Mars
D) Venus
Option d – Venus
The approximate diameter of our planet Earth is
A) 8,000 km
B) 100,000 km
C) 12,800 km
D) None of the above
Option c – 12,800 km
Unlike Earth’s molten core, the Moon’s core is primarily
A) Plasma
B) Gas
C) Semi-liquid
D) Solid
Option c – Semi-liquid
Who was the first to suggest that the Earth is round?
A) Aristotle
B) Copernicus
C) Ptolemy
D) Strabo
Option a – Aristotle
Sometimes, Earth is metaphorically referred to as
A) Cow
B) Sita
C) Green Planet
D) Harmij
Option c – Green Planet
The element that dominates Earth’s crust is
A) Oxygen
B) Aluminium
C) Iron
D) Silicon
Option a – Oxygen
Approximately how long does sunlight take to reach Earth?
A) 2 minutes
B) 1 minute
C) 8 minutes
D) 16 minutes
Option c – 8 minutes
Which star is the closest to Earth?
A) Polaris
B) Alpha Centauri
C) Sun
D) Sirius
Option c – Sun
Which planet is geographically closest to Earth?
A) Neptune
B) Mars
C) Saturn
D) Jupiter
Option b – Mars
Which planet comes nearest to Earth in its orbit?
A) Venus
B) Mercury
C) Mars
D) Jupiter
Option a – Venus
How many days does Earth require to make a full revolution around the Sun?
A) 365 days
B) 365.25 days
C) 365.5 days
D) 365.75 days
Option b – 365.25 days
What is the Earth’s average orbital speed around the Sun?
A) 20 km/sec
B) 30 km/sec
C) 40 km/sec
D) 50 km/sec
Option b – 30 km/sec
Approximately how far does Earth travel every minute during its orbit?
A) 49 km
B) 59 km
C) 69 km
D) 28 km
Option d – 28 km
The equatorial circumference of Earth is about
A) 31,000 km
B) 40,000 km
C) 50,000 km
D) 64,000 km
Option b – 40,000 km
At what angle is the Earth’s rotational axis inclined?
A) 23.5°
B) 66°
C) 33.4°
D) 42.4°
Option a – 23.5°
Earth’s polar axis is tilted at an angle of
A) 23.0° from the ecliptic
B) 23.19° from the ecliptic
C) 24.5° from the ecliptic
D) 23.5° from the ecliptic
Option d – 23.5° from the ecliptic
The main reason for day and night is
A) Earth’s rotation
B) Rotation of Earth on its axis
C) Tilt of Earth’s axis
D) Moon’s rotation
Option b – Rotation of Earth on its axis
When day and night are equal, sunlight falls directly at
A) North Pole
B) Equator
C) South Pole
D) Tropic of Cancer
Option b – Equator
What mainly causes the seasons on Earth?
A) Revolution around the Sun
B) Axial tilt of 23.5°
C) Both revolution and axial tilt
D) Earth’s rotation
Option c – Both revolution and axial tilt
Which factor causes seasonal variations?
A) Earth’s rotation and revolution
B) Earth’s revolution only
C) Earth’s revolution and axial tilt
D) Earth’s rotation and tilt
Option c – Earth’s revolution and axial tilt
Why is it hotter at noon in summer compared to winter at a specific location?
A) Earth is closer to the Sun in summer
B) Sun rays bend more toward Earth in winter
C) Water vaporizes only in winter
D) Earth’s axis tilts more toward the Sun in winter
Option b – Sun rays bend more toward Earth in winter
If the Sun were a quarter closer to Earth, which effect is most likely?
A) Earth would fall into the Sun
B) Earth would be scorched
C) Year duration would shorten
D) Earth would drift away into space
Option c – Year duration would shorten
Deserts are most commonly found near which latitude on Earth?
A) 0°
B) 23°
C) 50°
D) 70°
Option b – 23°
Identify the odd one.
A) Mars
B) Mercury
C) Moon
D) Earth
Option c – Moon
Which of these is not classified as a planet?
A) Moon
B) Earth
C) Mars
D) Mercury
Option a – Moon
The term ‘Blue Moon’ is used when
A) Two full Moons occur within a single month
B) Four full Moons happen in two consecutive months of the same year
C) Two full Moons appear in the same month, three times in a year
D) None of the above
Option d – None of the above
What happens to an object’s weight when moved from Earth to the Moon?
A) It becomes heavier
B) It becomes lighter
C) Weight remains the same
D) It experiences complete weightlessness
Option b – It becomes lighter
The approximate distance from Earth to the Moon is
A) 384,000 km
B) 300,000 km
C) 446,000 km
D) 350,000 km
Option a – 384,000 km
Which Asian country first sent the ‘SELENE’ (Selenological and Engineering Explorer) spacecraft into lunar orbit?
A) Japan
B) China
C) India
D) Pakistan
Option a – Japan
Between which planets are most asteroids located?
A) Mercury and Venus
B) Mars and Jupiter
C) Jupiter and Saturn
D) Neptune and Saturn
Option b – Mars and Jupiter
The small rocky objects orbiting the Sun between Mars and Jupiter are called ( Universe mcq for UPSC Preliminary exam )
A) Meteors
B) Comets
C) Meteoroids
D) Asteroids
Option d – Asteroids
Comet Shoemaker-Levy collided with which planet? ( Universe mcq for UPSC Preliminary exam )
A) Pluto
B) Mars
C) Jupiter
D) Saturn
Option c – Jupiter
A meteor is ( Universe mcq for UPSC Preliminary exam )
A) A rapidly moving star
B) A fragment from space entering Earth’s Atmosphere
C) A component of a star system
D) The tail of a comet
Option b – A fragment from space entering Earth’s Atmosphere
Why does a comet’s tail always point away from the Sun? ( Universe mcq for UPSC Preliminary exam )
A) Centrifugal force pushes the lighter part outward
B) Nearby stars attract the tail’s lighter Matter
C) Solar radiation exerts pressure, pushing the tail away
D) The tail keeps a fixed orientation
Option c – Solar radiation exerts pressure, pushing the tail away
Hale-Bopp is the name of a ( Universe mcq for UPSC Preliminary exam )
A) Comet
B) Cartoon character
C) International corporation
D) Toy
Option a – Comet
Assertion (A): Black holes cannot be observed with a telescope. Reason (R): The gravitational pull of a black hole is so intense that even Light cannot escape. Which is correct? ( Universe mcq for UPSC Preliminary Exam )
A) Both (A) and (R) are true, and (R) explains (A)
B) Both (A) and (R) are true, but (R) does not explain (A)
C) (A) is true, but (R) is false
D) (A) is false, but (R) is true
Option a – Both (A) and (R) are true, and (R) explains (A)
A person in a spacecraft located between Earth and Sun observes the following: 1. The sky appears black 2. Stars do not twinkle 3. The external temperature is higher than on Earth. Which observation(s) is/are correct? ( Universe mcq for UPSC Preliminary Exam )
A) Only 3
B) Only 1 and 2
C) Only 1 and 3
D) All 1, 2, and 3
Option b – Only 1 and 2
Arrange these planets by increasing distance from the Sun: Neptune, Earth, Jupiter, Uranus. ( Universe MCQ for UPSC Preliminary Exam )
A) Earth, Jupiter, Uranus, Neptune
B) Uranus, Jupiter, Earth, Neptune
C) Jupiter, Earth, Uranus, Neptune
D) Neptune, Earth, Uranus, Jupiter
Option a – Earth, Jupiter, Uranus, Neptune
Arrange these planets in order of decreasing size: Jupiter, Uranus, Earth, Saturn. ( Universe MCQ for UPSC Preliminary Exam )
A) Jupiter, Saturn, Earth, Uranus
B) Saturn, Jupiter, Uranus, Earth
C) Jupiter, Saturn, Uranus, Earth
D) Saturn, Jupiter, Earth, Uranus
Option c – Jupiter, Saturn, Uranus, Earth
Consider the following statements about albedo: 1. Albedo influences how bright an object appears when Light is reflected from it 2. Mercury has a higher albedo than Earth. Which statement(s) is/are correct? ( Universe MCQ for UPSC Preliminary Exam )
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither 1 nor 2
Option a – Only 1
Assertion (A): Life cannot exist on Venus. Reason (R): Venus has an extremely dense carbon dioxide Atmosphere. Which option is correct? ( Universe MCQ for UPSC Preliminary Exam )
A) Both (A) and (R) are true, and (R) explains (A)
B) Both (A) and (R) are true, but (R) does not explain (A)
C) (A) is true, but (R) is false
D) (A) is false, but (R) is true
Option a – Both (A) and (R) are true, and (R) explains (A)
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