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

Match the following:

a. Stars 1. are the group of stars which appear to form some recognisable shape or pattern
b. Constellations 2. are the large celestial objects which revolve around the Sun in closed elliptical paths called orbits
c. Planets 3. are the celestial objects that are extremely hot and have light of their own

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

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

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

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

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

This is the correct option. Stars are the celestial objects that are extremely hot and have light of their own. Constellations are the group of stars which appear to form some recognisable shape or pattern. Planets are the large celestial objects which revolve around the Sun in closed elliptical paths called orbits.

Multiple choice

BRIGHTEST STAR.

  1. SIRUS

  2. NOVA

  3. SIPRUS

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

Sirius, also known as the Dog Star, is the brightest star in the Earth's night sky. It is located in the constellation Canis Major and has an apparent magnitude of -1.46.

Multiple choice

Which of the following is the largest starfish?

  1. Pycnopodia helianthoides

  2. Linckia laevigata

  3. Asterias rubens

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

Pycnopodia helianthoides, commonly known as the sunflower sea star, is widely recognized as one of the largest starfish species in the world.

Multiple choice

Super Nova is

  1. a black hole

  2. a dying star

  3. a comet

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A supernova is the powerful and luminous explosion of a star, marking the final stage of a massive star's life cycle.

Multiple choice

A star which appears blue is

  1. hotter than the Sun

  2. cooler than the Sun

  3. as hot as the Sun

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

According to Wien's displacement law, the color of a star is related to its surface temperature. Blue stars are hotter than yellow stars like our Sun, while red stars are cooler.