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

Which space telescope is primarily designed to study the early universe and the cosmic microwave background?

  1. Hubble Space Telescope

  2. James Webb Space Telescope

  3. Planck Space Telescope

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

The Planck Space Telescope was specifically designed to study the cosmic microwave background and the early universe.

Multiple choice

Which of the following types of nebulae was first identified by Meghnad Saha?

  1. Emission Nebulae

  2. Reflection Nebulae

  3. Planetary Nebulae

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

Meghnad Saha's classification scheme included the identification of emission nebulae, which are characterized by their emission of light due to the excitation of gases within them. This discovery significantly contributed to our understanding of the diverse nature of nebulae.

Multiple choice

What is the name of the classification scheme developed by M.K. Vainu Bappu for symbiotic stars?

  1. Bappu-Morgan Classification

  2. Saha-Vainu Bappu Classification

  3. Shapley-Bappu Classification

  4. Chandrasekhar-Bappu Classification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

M.K. Vainu Bappu collaborated with American astronomer W.W. Morgan to develop the Bappu-Morgan Classification scheme for symbiotic stars. This scheme categorizes symbiotic stars based on their spectral characteristics and the presence of emission lines.

Multiple choice

What is the name of the classification scheme proposed by T.P. Bhaskaran for planetary nebulae?

  1. Bhaskaran-Shapley Classification

  2. Saha-Bhaskaran Classification

  3. Chandrasekhar-Bhaskaran Classification

  4. Morgan-Bhaskaran Classification
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

T.P. Bhaskaran collaborated with American astronomer W.W. Morgan to develop the Morgan-Bhaskaran Classification scheme for planetary nebulae. This scheme categorizes planetary nebulae based on their morphological appearance and the presence of emission lines.

Multiple choice

What is the name of the classification scheme developed by J.N. Tandon for extragalactic nebulae?

  1. Tandon-Shapley Classification

  2. Saha-Tandon Classification

  3. Chandrasekhar-Tandon Classification

  4. Morgan-Tandon Classification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

J.N. Tandon collaborated with American astronomer Harlow Shapley to develop the Tandon-Shapley Classification scheme for extragalactic nebulae. This scheme categorizes extragalactic nebulae based on their morphological characteristics and the presence of emission lines.

Multiple choice

What is the name of the classification scheme proposed by U.R. Rao for dark nebulae?

  1. Rao-Shapley Classification

  2. Saha-Rao Classification

  3. Chandrasekhar-Rao Classification

  4. Morgan-Rao Classification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

U.R. Rao collaborated with American astronomer Harlow Shapley to develop the Rao-Shapley Classification scheme for dark nebulae. This scheme categorizes dark nebulae based on their morphological characteristics and their association with other celestial objects.

Multiple choice

What is the name of the classification scheme proposed by T.P. Bhaskaran for the Orion Nebula?

  1. Bhaskaran-Shapley Classification

  2. Saha-Bhaskaran Classification

  3. Chandrasekhar-Bhaskaran Classification

  4. Morgan-Bhaskaran Classification
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

T.P. Bhaskaran collaborated with American astronomer Harlow Shapley to develop the Bhaskaran-Shapley Classification scheme for the Orion Nebula. This scheme categorizes different regions of the nebula based on their morphological characteristics and the presence of emission lines.

Multiple choice

What is the name of the space telescope that is designed to study the early universe and the formation of the first galaxies?

  1. James Webb Space Telescope

  2. Hubble Space Telescope

  3. Spitzer Space Telescope

  4. Chandra X-ray Observatory
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The James Webb Space Telescope is a next-generation space telescope designed to study the early universe and the formation of the first galaxies.

Multiple choice

Which eclipse series is the longest-lasting Saros series known to date?

  1. Saros Series 117

  2. Saros Series 120

  3. Saros Series 123

  4. Saros Series 126
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Saros Series 126 is the longest-lasting Saros series known to date, with a duration of approximately 1523 years.

Multiple choice

According to Indian astronomy, what is the nature of a White Dwarf?

  1. A hot, dense star that has exhausted its nuclear fuel

  2. A cool, dense star that has exhausted its nuclear fuel

  3. A hot, gaseous star that is still burning nuclear fuel

  4. A cool, gaseous star that is still burning nuclear fuel
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Indian astronomy describes White Dwarfs as hot, dense stars that have exhausted their nuclear fuel and are no longer undergoing fusion reactions.

Multiple choice

What is the approximate size of a White Dwarf?

  1. The size of a small planet

  2. The size of a large planet

  3. The size of the Sun

  4. The size of a grain of sand
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White Dwarfs are typically about the size of a small planet, such as Earth or Mars.

Multiple choice

What is the approximate mass of a White Dwarf?

  1. The mass of the Sun

  2. The mass of a small planet

  3. The mass of a large planet

  4. The mass of a grain of sand
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White Dwarfs have masses comparable to that of the Sun, despite their small size.

Multiple choice

What is the fate of a White Dwarf?

  1. It will eventually cool down and become a Black Dwarf

  2. It will eventually explode as a Supernova

  3. It will remain a White Dwarf indefinitely

  4. It will merge with another White Dwarf to form a neutron star
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Over time, White Dwarfs will gradually cool down and eventually become Black Dwarfs, which are hypothetical objects that have cooled to the point where they no longer emit any significant radiation.

Multiple choice

What is the approximate density of a White Dwarf?

  1. 100,000 times that of water

  2. 10,000 times that of water

  3. 1,000 times that of water

  4. 100 times that of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White Dwarfs have extremely high densities, approximately 100,000 times that of water, due to the immense gravitational forces acting upon their compact mass.

Multiple choice

Which of the following is NOT a characteristic of White Dwarfs?

  1. They are supported by electron degeneracy pressure

  2. They are the remnants of massive stars

  3. They are composed primarily of carbon and oxygen

  4. They are extremely luminous
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

White Dwarfs are not extremely luminous, as they have exhausted their nuclear fuel and no longer undergo fusion reactions. They primarily emit heat from their residual thermal energy.