Physics · Science General

Astronomy and Cosmology

4,498 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

A white dwarf is a/an

  1. constellation

  2. small star

  3. commet

  4. asteroid
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A white dwarf is a stellar remnant composed mainly of electron-degenerate matter - essentially the exposed core of a star that has exhausted its nuclear fuel. They are very dense but small in size (about Earth-sized) and slowly cool over billions of years. Constellations are star patterns, comets are icy bodies, and asteroids are rocky objects.

Multiple choice

Which of the following sequence is correct?

  1. Earth - Universe - Milky Way Galaxy - Solar System

  2. Earth - Solar System - Milky Way Galaxy - Universe

  3. Universe - Earth - Solar System - Milky Way Galaxy

  4. Solar System - Earth - Universe - Milky Way Galaxy

  5. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is the correct option.

Multiple choice

Which of the folowing is the other name for a shooting star?

  1. Comet

  2. Asteroid

  3. Meteor

  4. Meteorites

  5. Milky Way
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Meteor is made of debris. It enters the Earth's atmosphere at a very high speed. The friction with the atmosphere makes the meteor hot and it burns till it disintegrates. As it falls to the ground, it glows  brightly. Thus, it is called a shooting star.

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.