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 dark matter halo of the Milky Way Galaxy thought to be composed of?

  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

The dark matter halo of the Milky Way Galaxy is thought to be composed primarily of weakly interacting massive particles (WIMPs). WIMPs are hypothetical particles that are massive but do not interact strongly with ordinary matter.

Multiple choice

How many nebulae are included in the Jyeshtadeva Nebulae Atlas?

  1. 108

  2. 216

  3. 324

  4. 432
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Jyeshtadeva Nebulae Atlas includes 108 nebulae.

Multiple choice

How many nebulae are included in the Nilakantha Somayaji Nebulae Atlas?

  1. 108

  2. 216

  3. 324

  4. 432
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Nilakantha Somayaji Nebulae Atlas includes 216 nebulae.

Multiple choice

How many nebulae are included in the Subbaraya Shastry Nebulae Atlas?

  1. 108

  2. 216

  3. 324

  4. 432
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The Subbaraya Shastry Nebulae Atlas includes 432 nebulae.

Multiple choice

How many nebulae are included in the T. P. Bhaskaran Nebulae Atlas?

  1. 108

  2. 216

  3. 324

  4. 432
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The T. P. Bhaskaran Nebulae Atlas includes 108 nebulae.

Multiple choice

Which asteroid is the most common type?

  1. C-type

  2. S-type

  3. M-type

  4. V-type
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

C-type asteroids are the most common type, accounting for about 75% of all known asteroids.

Multiple choice

Which asteroid is the second most common type?

  1. S-type

  2. M-type

  3. V-type

  4. D-type
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

S-type asteroids are the second most common type, accounting for about 17% of all known asteroids.

Multiple choice

Which asteroid is the third most common type?

  1. M-type

  2. V-type

  3. D-type

  4. T-type
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

M-type asteroids are the third most common type, accounting for about 6% of all known asteroids.

Multiple choice

Which asteroid is the fourth most common type?

  1. V-type

  2. D-type

  3. T-type

  4. J-type
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

V-type asteroids are the fourth most common type, accounting for about 2% of all known asteroids.

Multiple choice

Which asteroid is the fifth most common type?

  1. D-type

  2. T-type

  3. J-type

  4. P-type
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

D-type asteroids are the fifth most common type, accounting for about 1% of all known asteroids.

Multiple choice

What is the primary technique used in asteroseismic studies of stellar binaries and multiple star systems?

  1. Photometry

  2. Spectroscopy

  3. Astrometry

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

Asteroseismic studies of stellar binaries and multiple star systems primarily rely on photometry, which involves measuring the variations in a star's brightness over time. These brightness variations are caused by stellar oscillations, which can be analyzed to infer information about the star's properties.

Multiple choice

What type of stellar oscillations are typically studied in asteroseismic investigations of binary and multiple star systems?

  1. Radial pulsations

  2. Non-radial pulsations

  3. Mixed-mode pulsations

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Asteroseismic studies of binary and multiple star systems investigate various types of stellar oscillations, including radial pulsations (where the star expands and contracts along its radius), non-radial pulsations (where the star oscillates in specific patterns across its surface), and mixed-mode pulsations (a combination of radial and non-radial oscillations). Each type of oscillation provides unique information about the star's properties.

Multiple choice

What is the term used to describe the phenomenon where the orbital period of a binary star system changes due to the gravitational influence of a third star?

  1. Orbital precession

  2. Orbital resonance

  3. Tidal interaction

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

The Kozai mechanism is the phenomenon where the orbital period of a binary star system changes due to the gravitational influence of a third star. This mechanism can cause the eccentricity of the binary orbit to vary over time, leading to changes in the orbital period.

Multiple choice

What is the primary reason for the observed frequency differences between oscillation modes in binary and multiple star systems?

  1. The gravitational influence of the companion stars

  2. The different evolutionary stages of the stars

  3. The presence of magnetic fields

  4. The effects of stellar pulsations
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The primary reason for the observed frequency differences between oscillation modes in binary and multiple star systems is the gravitational influence of the companion stars. The gravitational interaction between the stars causes perturbations in the stellar oscillations, leading to frequency shifts that can be detected and analyzed.

Multiple choice

What is the most common type of supernova depicted on stamps?

  1. Type Ia

  2. Type II

  3. Type Ib/c

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

Type Ia supernovas are the most common type depicted on stamps due to their relative frequency and the fact that they are well-studied and understood.