Physics · Science General

Astronomy and Cosmology

4,450 Questions

This topic provides questions on astronomy, cosmology, and the physical universe. It covers subjects like the Hubble sequence, constellations, dark matter, and stellar evolution. These questions help build a strong foundation for general science exam sections.

Galaxies and clustersConstellations and starsStellar evolutionSpace observatories

Astronomy and Cosmology Questions

Multiple choice

What is common between the Sun and Alpha Centauri?

  1. Both are equidistance from Earth.

  2. Both are of same size.

  3. Both are stars.

  4. Both are part of a common constellation.

  5. All of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is the correct answer. Both the celestial bodies are stars.

Multiple choice

A meteor is

  1. a rapidly moving star

  2. a matter which has entered the atmosphere from outer space

  3. a part of a constellation

  4. a comet without a tail
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A meteor is a small piece of rock or debris from space that enters Earth's atmosphere and burns up due to friction, creating a streak of light. This is the correct scientific definition. Option A is incorrect because stars are massive celestial bodies, not small debris. Option C confuses meteors with constellations, and D incorrectly describes comets.

Multiple choice

Directions: Fill "Collective Noun" in the following questions. A of stars.

  1. constellation

  2. group

  3. cluster

  4. association
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A constellation refers to a recognized pattern or group of stars forming a configuration in the night sky. This is the correct collective noun for stars in astronomical contexts. 'Cluster' could also work for star clusters but 'constellation' is more specific to named patterns.

Multiple choice

Match the following constellations with their respective shape?

     
1 Orion a Dwarf planet
2 Pluto b Hunter
3 Mercury c Outline of lion
4 Leo d Budh

  1. 1 - b, 2 - a, 3 - d, 4 - c

  2. 1 - a, 2 - b, 3 - d, 4 - c

  3. 1 - b, 2 - c, 3 - d, 4 - a

  4. 1 - b, 2 - a, 3 - c, 4 - d

  5. 1 - c, 2 - d, 3 - b, 4 - a
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is matched correctly. Orion, which appears like a human figure with a belt, often referred to as The Hunter. Leo, which contains bright stars that outline the form of a lion. Mercury is a planet called as Budh and Pluto is a dwarf planet.

Multiple choice

Manohar saw a bright streak with no specific structure, in the sky, which lasted for a very short time. What could that be?

  1. A comet

  2. An asteroid

  3. A meteor

  4. A star

  5. A planet
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct. A meteor is usually a small object that occasionally enters the earth’s atmosphere. The friction due to the atmosphere heats it up. It glows and evaporates quickly. That is why the bright streak lasts for a very short time.

Multiple choice

Cosmic noise is caused by

  1. lighting discharges

  2. solar eruptions

  3. distant stars

  4. industrial discharges
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cosmic noise, also called cosmic background radiation, is electromagnetic radiation from distant stars and galaxies that reaches Earth. Option A refers to lightning, option B to solar flares (solar noise), and option D is man-made industrial noise.