Physics ยท 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

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.

Multiple choice

What is the name of the galaxy that is farthest from us?

  1. GN-z11

  2. UDFj-39546284

  3. J0313-1806

  4. EGSY8p7
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GN-z11 is the farthest galaxy from us, located about 13.4 billion light-years away.

Multiple choice

What is the name of the galaxy that is the largest in the universe?

  1. IC 1101

  2. UGC 2885

  3. SDSS J1150+0252

  4. Ton 618
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IC 1101 is the largest galaxy in the universe, with a diameter of about 6 million light-years.

Multiple choice

What is the name of the galaxy that is the smallest in the universe?

  1. Segue 1

  2. Draco II

  3. Eridanus II

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

Segue 1 is the smallest galaxy in the universe, with a diameter of only about 100 light-years.

Multiple choice

What is the name of the galaxy that is the most massive in the universe?

  1. M87

  2. NGC 1277

  3. Holmberg 15A

  4. IC 1101
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

M87 is the most massive galaxy in the universe, with a mass of about 6.6 trillion solar masses.

Multiple choice

What is the name of the galaxy that is the least massive in the universe?

  1. Segue 1

  2. Draco II

  3. Eridanus II

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

Segue 1 is the least massive galaxy in the universe, with a mass of only about 100,000 solar masses.

Multiple choice

What is the term for the phenomenon in which stars appear to twinkle?

  1. Scintillation

  2. Seeing

  3. Chromatic aberration

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

Scintillation is the term for the phenomenon in which stars appear to twinkle.