Physics ยท 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 the name of the galaxy that is the most massive in the known universe?

  1. IC 1101

  2. UGC 2885

  3. NGC 4889

  4. ESO 444-46
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IC 1101 is the most massive galaxy in the known universe, with an estimated mass of over 100 trillion times that of the Sun.

Multiple choice

Which galaxy is known for its unusual double nucleus?

  1. NGC 6240

  2. Arp 220

  3. Centaurus A

  4. M87
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NGC 6240 is a peculiar galaxy with two distinct nuclei, each with its own supermassive black hole.

Multiple choice

What is the name of the galaxy that is the most luminous in the infrared spectrum?

  1. Arp 220

  2. IRAS F10214+4724

  3. NGC 1068

  4. M82
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

IRAS F10214+4724 is the most luminous galaxy in the infrared spectrum, emitting vast amounts of infrared radiation.

Multiple choice

What is the primary method used by Indian astronomers to study dark matter in the Local Group?

  1. Gravitational Lensing

  2. X-ray Observations

  3. Radio Astronomy

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

Indian astronomers primarily employ gravitational lensing techniques to study dark matter in the Local Group. By analyzing the distortion of light from distant galaxies due to the gravitational influence of dark matter, they can infer its presence and distribution.

Multiple choice

What is the estimated mass of the dark matter halo surrounding the Milky Way galaxy?

  1. 10^11 solar masses

  2. 10^12 solar masses

  3. 10^13 solar masses

  4. 10^14 solar masses
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The estimated mass of the dark matter halo surrounding the Milky Way galaxy is approximately 10^12 solar masses. This vast amount of dark matter plays a crucial role in shaping the dynamics and structure of our galaxy.

Multiple choice

What is the name of our galaxy?

  1. Milky Way

  2. Andromeda

  3. Sombrero Galaxy

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

The Milky Way is a barred spiral galaxy that contains our solar system.

Multiple choice

What is the closest major galaxy to our own?

  1. Andromeda

  2. Sombrero Galaxy

  3. Pinwheel Galaxy

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

Andromeda is the closest major galaxy to our own, located about 2.5 million light-years away.

Multiple choice

What is the shape of our galaxy?

  1. Spiral

  2. Elliptical

  3. Irregular

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

Our galaxy is a barred spiral galaxy, which means it has a central bulge surrounded by a disk of stars and gas.

Multiple choice

What is the diameter of our galaxy?

  1. 100,000 light-years

  2. 200,000 light-years

  3. 300,000 light-years

  4. 400,000 light-years
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Our galaxy is about 100,000 light-years in diameter.

Multiple choice

How many stars are there in our galaxy?

  1. 100 billion

  2. 200 billion

  3. 300 billion

  4. 400 billion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Our galaxy is estimated to contain about 200 billion stars.

Multiple choice

What is the mass of our galaxy?

  1. 1 trillion solar masses

  2. 2 trillion solar masses

  3. 3 trillion solar masses

  4. 4 trillion solar masses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Our galaxy is estimated to have a mass of about 1 trillion solar masses.

Multiple choice

What is the age of our galaxy?

  1. 10 billion years

  2. 12 billion years

  3. 14 billion years

  4. 16 billion years
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Our galaxy is estimated to be about 13.6 billion years old.

Multiple choice

What is the fate of our galaxy?

  1. It will collide with Andromeda

  2. It will be swallowed by a black hole

  3. It will merge with another galaxy

  4. It will eventually die
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Our galaxy is expected to eventually die as its stars run out of fuel and collapse.

Multiple choice

What is the name of the supercluster that contains our galaxy?

  1. Virgo Supercluster

  2. Coma Supercluster

  3. Hercules Supercluster

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

Our galaxy is located in the Virgo Supercluster, which is the largest known supercluster in the universe.

Multiple choice

What is the name of the galaxy that is closest to us?

  1. Canis Major Dwarf Galaxy

  2. Sagittarius Dwarf Galaxy

  3. Draco Dwarf Galaxy

  4. Ursa Minor Dwarf Galaxy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Canis Major Dwarf Galaxy is the closest galaxy to us, located about 25,000 light-years away.