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

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.

Multiple choice

Directions: The following question consists of certain statements. You have to select the option representing the most logical sequencing of the given statements.

A. Stars radiate heat and light. B. Sun lies in the galaxy. C. Galaxy lies in the universe. D. Universe is a pulsating entity. E. Sun radiates heat and light. F. Sun is a star.

  1. ABF

  2. BCF

  3. AEF

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

As stars and sun radiate heat and light, therefore, sun is a star. Hence, 3 is the correct answer.

Multiple choice

Consider the following statements:

  1. Ceres is the largest asteroid, which was discovered in the asteriod belt.
  2. Sirius B was the first white dwarf to be observed.

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sirius B is a white dwarf, one of the three “classics”, discovered to be white dwarf stars in the early years of the 20th century (Sirius B was the second to be discovered – 40 Eridani B had been found much earlier.)

Multiple choice

Consider the following:

  1. Constellation refers to the group of stars forming a pattern that is traditionally named after its apparent form or identified with a mythological figure.
  2. Neptune is the planet that has the highest number of moons in our solar system

Which of the given statements is/are correct?

  1. Only 1

  2. Only 2

  3. Both 1 and 2

  4. Neither 1 nor 2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Statement 1 is correct. The group of stars forming a pattern that is traditionally named after its apparent form or identified with a mythological figure is referred to as constellation. Statement 2 is incorrect. Jupiter is the planet that has the highest number of moons in our solar system, i.e. 63 (till 2013)