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 located closest to the Perseus A galaxy?

  1. NGC 1275

  2. NGC 1272

  3. NGC 1265

  4. NGC 1253
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

NGC 1275 is a giant elliptical galaxy located closest to the Perseus A galaxy. It is about 250 million light-years away from Earth and is a dominant galaxy in the Perseus Cluster.

Multiple choice

What is the name of the Indian astronomical survey that aims to study the distribution of dark matter in the universe?

  1. Dark Energy Survey (DES)

  2. Sloan Digital Sky Survey (SDSS)

  3. Indian Dark Matter Survey (IDMS)

  4. Baryon Oscillation Spectroscopic Survey (BOSS)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Indian Dark Matter Survey (IDMS) is an astronomical survey that aims to study the distribution of dark matter in the universe.

Multiple choice

What is the name of the Indian astronomical survey that aims to study the distribution of dark matter in clusters of galaxies?

  1. Dark Energy Survey (DES)

  2. Sloan Digital Sky Survey (SDSS)

  3. Indian Dark Matter Survey (IDMS)

  4. Baryon Oscillation Spectroscopic Survey (BOSS)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Indian Dark Matter Survey (IDMS) is an astronomical survey that aims to study the distribution of dark matter in clusters of galaxies.

Multiple choice

What is the name of the Indian astronomical survey that aims to study the distribution of dark matter in the Milky Way galaxy?

  1. Dark Energy Survey (DES)

  2. Sloan Digital Sky Survey (SDSS)

  3. Indian Dark Matter Survey (IDMS)

  4. Baryon Oscillation Spectroscopic Survey (BOSS)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Indian Dark Matter Survey (IDMS) is an astronomical survey that aims to study the distribution of dark matter in the Milky Way galaxy.

Multiple choice

Which catalog is considered the most comprehensive and authoritative source of information on asteroids?

  1. The Minor Planet Center

  2. The Lowell Observatory Near-Earth Object Search

  3. The Catalina Sky Survey

  4. The Spacewatch Project
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Minor Planet Center is considered the most comprehensive and authoritative source of information on asteroids, maintaining a database of over 1 million known asteroids and providing data on their orbits, physical properties, and other characteristics.

Multiple choice

What is the primary method used in white dwarf asteroseismology to study the internal structure of white dwarfs?

  1. Photometry

  2. Spectroscopy

  3. Asteroseismology

  4. Radio Interferometry
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Asteroseismology, the study of stellar pulsations, is the primary method used to probe the internal structure of white dwarfs.

Multiple choice

What is the typical range of pulsation periods observed in white dwarfs?

  1. Seconds to minutes

  2. Hours to days

  3. Weeks to months

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

White dwarfs typically exhibit pulsation periods ranging from a few seconds to a few minutes.

Multiple choice

What information can be obtained from the analysis of white dwarf pulsations?

  1. Mass and radius

  2. Internal composition

  3. Magnetic field strength

  4. Rotation rate
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

Asteroseismology of white dwarfs allows us to determine their mass, radius, internal composition, magnetic field strength, and rotation rate.

Multiple choice

Which space mission played a significant role in advancing white dwarf asteroseismology?

  1. Hubble Space Telescope

  2. Kepler Space Telescope

  3. Chandra X-ray Observatory

  4. Spitzer Space Telescope
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Kepler Space Telescope provided valuable data for white dwarf asteroseismology, enabling the detection and analysis of pulsations in a large number of white dwarfs.

Multiple choice

What is the relationship between the pulsation frequency and the internal structure of a white dwarf?

  1. Higher frequency indicates a denser core

  2. Lower frequency indicates a more massive core

  3. Higher frequency indicates a larger radius

  4. Lower frequency indicates a smaller radius
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In general, higher pulsation frequency in white dwarfs corresponds to a denser core.

Multiple choice

What is the typical mass range of white dwarfs?

  1. 0.1 to 1.4 solar masses

  2. 1.4 to 2.5 solar masses

  3. 2.5 to 5 solar masses

  4. 5 to 10 solar masses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White dwarfs typically have masses ranging from 0.1 to 1.4 solar masses.

Multiple choice

What is the Chandrasekhar limit for the mass of a white dwarf?

  1. 1.4 solar masses

  2. 2.5 solar masses

  3. 5 solar masses

  4. 10 solar masses
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Chandrasekhar limit is approximately 1.4 solar masses, representing the maximum mass a white dwarf can support without undergoing a catastrophic collapse.

Multiple choice

What is the primary energy source for white dwarfs?

  1. Nuclear fusion

  2. Gravitational contraction

  3. Residual heat from stellar evolution

  4. Magnetic fields
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

White dwarfs primarily rely on residual heat from their previous stages of stellar evolution as their energy source.

Multiple choice

What is the final fate of a white dwarf?

  1. Collapse into a neutron star

  2. Explosion as a supernova

  3. Cooling and becoming a black dwarf

  4. Merging with another white dwarf
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ultimate fate of a white dwarf is to cool and eventually become a black dwarf, a cold, dark remnant of a star.

Multiple choice

Which of the following is NOT a type of planet that can be found in Stellar Saga?

  1. Earth-like planets

  2. Gas giants

  3. Ice planets

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

Lava planets are not a type of planet that can be found in Stellar Saga.