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

Which of the following is NOT true for the stars?

  1. Stars are present in sky during daytime also.

  2. Stars emit light of their own.

  3. Sun is also a star.

  4. Stars change their positions in the sky.

  5. Stars are millions of times farther away than the Sun.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stars do not change their positions in the sky. Due to the earth's rotation, they collectively seem to move from east to west.

Multiple choice

Which of the following options are true about stars?

A. Red coloured stars have the highest temperature. B. Stars are spheres of gases like hydrogen and helium. C. Blue coloured stars have the highest temperature. D. Stars are composed of silicon, nickel and chromium.

  1. Only A and B

  2. Only B and C

  3. Only C and D

  4. Only A and D
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stars are spheres of gases like hydrogen and helium and blue coloured stars have the highest temperature.

Multiple choice

Which of the following options are true?

A. There are about 1011 galaxies and each galaxy contains about 1011 stars. B. Big cluster of stars is known as galaxy. C. When the Milky Way galaxy is viewed from top, it appears elliptical in shape.

  1. Only A and B

  2. Only B and C

  3. Only A and C

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. There are about 1011 galaxies and each galaxy contains about 1011 stars.  B. Big cluster of stars is known as galaxy.