Physics · 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 of the following could replace 'tremble' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.
A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. vibrate

  2. shiver

  3. flicker

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

When the unsteady air bends the light from the star, they seem to twinkle. The twinkling of stars is a very well known phenomenon.

Multiple choice

Which of the following could replace 'At one end' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.
A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. Starting with

  2. Firstly

  3. On the one hand

  4. For example
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct usage is 'on the one hand'.

Multiple choice

Which of the following could replace 'reflected' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.
A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. thrown away

  2. sent back

  3. taken in

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

The light rays strike the surface of earth and then are sent back, which is known as reflection.

Multiple choice

Which of the following could replace ‘steady’ as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.
A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. uniform

  2. fixed

  3. bright

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

We are presenting a contrast in the sentence between stars and planets. Steady here means something that is constant or continuous as opposed to twinkle which means quick, intermittent flashes.

Multiple choice

Which of the following could replace ‘greatly’ as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. truly

  2. expectedly

  3. very much

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

‘Greatly’ here means to a large extent. Therefore, the correct option is ‘very much’.

Multiple choice

Which of the following could replace ‘steady’ as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. uniform

  2. fixed

  3. bright

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

We are presenting a contrast in the sentence between stars and planets. Steady here means something that is constant or continuous as opposed to twinkle which means quick, intermittent flashes.

Multiple choice

Which of the following could replace 'At one end' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. Starting with

  2. Firstly

  3. On the one hand

  4. For example
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The correct usage is 'on the one hand'.

Multiple choice

Which of the following is the correct spelling of 'desturbances'?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. desturbancis

  2. distarbences

  3. desturbences

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

The correct spellings are 'disturbances'.

Multiple choice

Which of the following could replace 'reflected' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. thrown away

  2. sent back

  3. taken in

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

The light rays strike the surface of earth and then are sent back, which is known as reflection.

Multiple choice

Which of the following could replace 'tremble' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. vibrate

  2. shiver

  3. flicker

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

When the unsteady air bends the light from the star, they seem to twinkle. The twinkling of stars is a very well known phenomenon.

Multiple choice

Which of the following could replace 'many times' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. repeatedly

  2. much

  3. over and over

  4. time and again
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

'Many times' can be replaced by 'much'.

Multiple choice

Which of the following could replace 'heavenly' as used in the passage?

Directions: Read the following passage carefully and select the most suitable option according to the corresponding number in the passage.

A star is a heavenly (1) body which shines by its own light. Planets, as you know, shine only by light reflected (2) from the sun. The planets shine with a steady (3) light and the stars twinkle. This twinkling is caused by desturbances (4) in the air between the star and the earth. The unsteady air bends the light from the star, which then appears to tremble (5). Stars differ greatly (6) in size, density and temperature. At one end (7), there are stars called “red super-giants,” which are many times (8) larger than our sun (which is also a star). At the other end, there are stars called “white dwarfs,” some of which are about the size of our earth.

  1. glittery

  2. beautiful

  3. divine

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

The is about the natural objects found in the sky, which are also known as 'celestial bodies'.

Multiple choice

A meteor is

  1. a rapidly moving star

  2. a piece of matter which has entered Earth's atmosphere from outer space

  3. part of a constellation

  4. a comet without a tail
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Meteor is a small celestial body which enters the Earth’s atmosphere due to the gravitational force of Earth. Meteors typically occur in the mesosphere.