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 closest known brown dwarf to our solar system?

  1. Barnard's Star

  2. Wolf 359

  3. Luhman 16

  4. WISE 0855-0714
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Luhman 16 is the closest known brown dwarf to our solar system, located approximately 6.5 light-years away.

Multiple choice

What is the approximate number of brown dwarfs estimated to exist in our galaxy?

  1. 10 million

  2. 100 million

  3. 1 billion

  4. 10 billion
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

It is estimated that there are approximately 100 billion brown dwarfs in our galaxy.

Multiple choice

Which of the following is NOT a major scientific question that the Thirty Meter Telescope will be able to address?

  1. The origin and evolution of galaxies

  2. The nature of dark matter and dark energy

  3. The formation of stars and planets

  4. The search for life beyond Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While the Thirty Meter Telescope will be able to address many important scientific questions, the search for life beyond Earth is not one of them.

Multiple choice

Which of the following is NOT a major scientific question that the Nancy Grace Roman Space Telescope will be able to address?

  1. The origin and evolution of galaxies

  2. The nature of dark matter and dark energy

  3. The formation of stars and planets

  4. The search for life beyond Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While the Nancy Grace Roman Space Telescope will be able to address many important scientific questions, the search for life beyond Earth is not one of them.

Multiple choice

Which of the following is NOT a major scientific question that the Thirty Meter Telescope will be able to address?

  1. The origin and evolution of galaxies

  2. The nature of dark matter and dark energy

  3. The formation of stars and planets

  4. The search for life beyond Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While the Thirty Meter Telescope will be able to address many important scientific questions, the search for life beyond Earth is not one of them.

Multiple choice

Which of the following is NOT a major scientific question that the Nancy Grace Roman Space Telescope will be able to address?

  1. The origin and evolution of galaxies

  2. The nature of dark matter and dark energy

  3. The formation of stars and planets

  4. The search for life beyond Earth
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While the Nancy Grace Roman Space Telescope will be able to address many important scientific questions, the search for life beyond Earth is not one of them.

Multiple choice

What is the name of the galaxy that was studied by Subrahmanyan Chandrasekhar to understand the dynamics of interacting galaxies?

  1. Andromeda Galaxy

  2. Milky Way Galaxy

  3. Sombrero Galaxy

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

Subrahmanyan Chandrasekhar studied the Cartwheel Galaxy to understand the dynamics of interacting galaxies.

Multiple choice

What is the name of the galaxy that was studied by Meghnad Saha to understand the interaction between galaxies and their intergalactic medium?

  1. Andromeda Galaxy

  2. Milky Way Galaxy

  3. Sombrero Galaxy

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

Meghnad Saha studied the Andromeda Galaxy to understand the interaction between galaxies and their intergalactic medium.

Multiple choice

What is the name of the star cluster that was studied by Subrahmanyan Chandrasekhar to understand the formation and evolution of star clusters?

  1. Pleiades star cluster

  2. Hyades star cluster

  3. Orion star cluster

  4. Taurus star cluster
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Subrahmanyan Chandrasekhar studied the Pleiades star cluster to understand the formation and evolution of star clusters.

Multiple choice

What is the primary evidence for the existence of dark matter?

  1. Gravitational lensing

  2. Galaxy rotation curves

  3. Cosmic microwave background radiation

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

Galaxy rotation curves show that the orbital velocities of stars in galaxies do not decrease as expected based on the visible mass of the galaxy, suggesting the presence of additional mass, i.e., dark matter.

Multiple choice

What is the primary component of dark matter, according to the most popular theory?

  1. Weakly interacting massive particles (WIMPs)

  2. Axions

  3. Sterile neutrinos

  4. Primordial black holes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Weakly interacting massive particles (WIMPs) are hypothetical particles that are massive but interact very weakly with ordinary matter. They are a popular candidate for dark matter because they can explain the observed properties of dark matter, such as its abundance and distribution.

Multiple choice

What is the name of the hypothetical particle that is thought to be responsible for the dark matter?

  1. Axion

  2. Quintessence

  3. WIMP

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

WIMP (Weakly Interacting Massive Particle) is a hypothetical particle that is thought to be responsible for the dark matter. It is characterized by a weak interaction with ordinary matter and a large mass.

Multiple choice

What is the name of the hypothetical particle that is thought to be responsible for the dark matter?

  1. Axion

  2. Quintessence

  3. WIMP

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

Axion is a hypothetical particle that is thought to be responsible for the dark matter. It is characterized by a very small mass and a very weak interaction with ordinary matter.

Multiple choice

In the "No Man's Sky" video game, players can explore a procedurally generated universe consisting of how many galaxies?

  1. 18 quintillion

  2. 100 trillion

  3. 100 billion

  4. 1 million
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

No Man's Sky boasts a vast procedurally generated universe with an estimated 18 quintillion galaxies for players to explore.

Multiple choice

What is the main component of an astrolabe?

  1. A graduated circle

  2. A pointer

  3. A sighting tube

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

The main component of an astrolabe is a graduated circle, which is used to measure the altitude of celestial bodies.