Free Astronomy and Space MCQs with Answers

11. Founder of modern astronomy was _________________?

• A. Archimedes
• B. William Gilbert
• C. Nicolas Copernicus
• D. Michael Faraday
• E. None of these

Explanation: Nicolaus Copernicus founded modern astronomy by proposing the heliocentric model, placing the Sun at the centre of the planetary system. The other scientists listed worked mainly in mechanics, magnetism or electricity.

12. Study of life in outer space is known as ?

• A. Endobiology
• B. Exobiology
• C. Enterobiology
• D. Neobiology
• E. Micro biology

Explanation: Exobiology, also called astrobiology, studies the possibility, origin and distribution of life beyond Earth. The prefixes endo- and entero- refer to within and intestine, respectively.

13. Upon completion in 2029, which of the following will become the most powerful telescope in the world?

• A. James webb 5.0 telescope
• B. Giant Magellan space telescope
• C. The Vainu Bappu Telescope
• D. Hubble space telescope 2.0

Explanation: The Giant Magellan Telescope is designed as an extremely large ground-based optical telescope, using several primary mirrors to achieve very high light-gathering and resolving power. The other listed names are either existing telescopes or fictitious descriptions.

14. Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72-80 years. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-_________?

• A. 2065
• B. 2061
• C. 2040
• D. None of These

Explanation: Halley's Comet takes about 75 years to orbit the Sun, so its return after 1986 is expected in 2061. Its long period distinguishes it from comets that return within a few years.

15. According to Big Bang Theory, the Universe began about __________ billion years ago.

• A. 10 - 20
• B. 20 - 30
• C. 30 - 40
• D. 40 - 50

Explanation: Modern measurements place the Big Bang at about 13.8 billion years ago, which falls within the 10–20 billion-year range. The wider ranges begin far above the accepted estimate.

16. The planets visible to us without using a telescope are __________?

• A. 3
• B. 4
• C. 5
• D. 6Physics

Explanation: Five planets can normally be seen with the unaided eye: Mercury, Venus, Mars, Jupiter and Saturn. Uranus is usually too faint for ordinary naked-eye observation.

17. The bodyguard of the Earth is __________ that save the Earth from many Comets and Asteroids.

• A. Mars
• B. Saturn
• C. Uranus
• D. Jupiter

Explanation: Jupiter’s enormous mass and strong gravity can attract or deflect some comets and asteroids, leading to its popular description as Earth’s bodyguard. This is an informal description, not complete protection from impacts.

18. 1 light year = ?

• A. 9.5×106 km
• B. 9.5×109 km
• C. 9.5×1012 km
• D. 9.5×1018 km

Explanation: A light-year is the distance light travels in one year, approximately 9.46 × 10¹² kilometres. It is a unit of distance, not time.

19. The Great Spot is on the planet __________?

• A. Saturn
• B. Venus
• C. Mars
• D. Jupiter

Explanation: The Great Red Spot is a gigantic, long-lasting storm in Jupiter’s atmosphere. Its reddish appearance and oval shape make it a distinctive feature of the planet.

20. The planet which is easily visible from the Earth is?

• A. Mercury
• B. Venus
• C. Mars
• D. Jupiter

Explanation: Venus is the easiest planet to see because its clouds reflect sunlight strongly, making it the brightest planet in Earth’s sky. It is commonly called the morning star or evening star.