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 term used to describe the process by which a protostar gains mass from the surrounding molecular cloud?

  1. Accretion

  2. Fusion

  3. Radiation Pressure

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

Accretion is the process by which a protostar grows in mass.

Multiple choice

What is the name of the stage in star formation when the protostar begins to fuse hydrogen into helium in its core?

  1. Main Sequence Star

  2. Red Giant

  3. White Dwarf

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

Main sequence stars are stars that are fusing hydrogen into helium in their cores.

Multiple choice

Which type of star is formed when a massive protostar collapses at the end of its life?

  1. Black Hole

  2. Neutron Star

  3. White Dwarf

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

Black holes are formed when massive stars collapse at the end of their lives.

Multiple choice

What is the name of the region in a galaxy where star formation is most active?

  1. Galactic Center

  2. Spiral Arms

  3. Bulge

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

Spiral arms are the sites of active star formation in galaxies.

Multiple choice

Which type of galaxy is known for its high rate of star formation?

  1. Elliptical Galaxy

  2. Spiral Galaxy

  3. Lenticular Galaxy

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

Spiral galaxies are known for their high rates of star formation.

Multiple choice

What is the name of the process by which a galaxy's star formation rate is regulated?

  1. Feedback

  2. Accretion

  3. Radiation Pressure

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

Feedback from supernovae and stellar winds regulates a galaxy's star formation rate.

Multiple choice

Which type of star is formed when a low-mass protostar collapses at the end of its life?

  1. Black Hole

  2. Neutron Star

  3. White Dwarf

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

White dwarfs are formed when low-mass stars collapse at the end of their lives.

Multiple choice

What is the name of the process by which a star ejects its outer layers at the end of its life?

  1. Supernova

  2. Nova

  3. Flare

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

Supernovae are the explosions that occur when massive stars die.

Multiple choice

Which type of star is formed when a medium-mass protostar collapses at the end of its life?

  1. Black Hole

  2. Neutron Star

  3. White Dwarf

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

Neutron stars are formed when medium-mass stars collapse at the end of their lives.

Multiple choice

What is the name of the region in a galaxy where star formation is no longer occurring?

  1. Galactic Center

  2. Spiral Arms

  3. Bulge

  4. Halo
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The halo is the region in a galaxy where star formation is no longer occurring.

Multiple choice

Which type of galaxy is known for its low rate of star formation?

  1. Elliptical Galaxy

  2. Spiral Galaxy

  3. Lenticular Galaxy

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

Elliptical galaxies are known for their low rates of star formation.

Multiple choice

What is the oldest known star chart?

  1. The Nebra Sky Disk

  2. The Starry Night by Vincent van Gogh

  3. The Planisphere of Claudius Ptolemy

  4. The Uranometria by Johann Bayer
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Nebra Sky Disk is a bronze disk dating back to 1600 BC, and is the oldest known depiction of the night sky.

Multiple choice

What is the name of the constellation that contains the North Star?

  1. Ursa Major

  2. Ursa Minor

  3. Draco

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

The North Star, also known as Polaris, is located in the constellation Ursa Minor.

Multiple choice

What is the name of the brightest star in the night sky?

  1. Sirius

  2. Canopus

  3. Arcturus

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

Sirius is the brightest star in the night sky, with an apparent magnitude of -1.46.

Multiple choice

What is the name of the closest star to Earth?

  1. Proxima Centauri

  2. Alpha Centauri A

  3. Alpha Centauri B

  4. Barnard's Star
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proxima Centauri is the closest star to Earth, located just 4.2 light-years away.