Stars

Q.

Is it true that sun is not stationary and revolves or moves around the galaxy?

Q.

The energy production in stars is due to

1. combustion

2. nuclear fusion

3. nuclear fission

4. chemical reaction

Q.

All stars are of the same colour as that of the sun.

1. True

2. False

Q.

The celestial bodies that emit light of their own like our sun are

1. asteroids

2. satellites

3. stars

4. planet

Q.

Which star is the nearest to Earth after Sun?

1. Moon

2. Jupiter

3. Alpha centauri

4. Pole star

Q. The Sun appears to rise in the ____, and set in the ____.

1. West, East
2. East, East
3. West, West
4. East, West

Q.

The maximum mass of White Dwarf stars is 1.44 times the mass of the sun. What is this limit called?

1. None of these

2. Roche's Limit

3. Chandrasekhar limit

4. Hill radius

Q. What observations did Galileo made from his telescope?

Q. The expression for acceleration due to gravity $\left(g\right)$ near the surface of a planet of mass $\left(M\right)$ and radius $\left(r\right)$ is:

G: Gravitational constant

1. $g=\frac{GM}{r}$
2. $g=\frac{GM}{r^2}$
3. $g=\frac{GM}{r^3}$
4. $g=\frac{G{M}^2}{r}$

Q. The stars are formed from:

1. Nabulae
2. Comet
3. Satellite
4. Planet

Q. Natural satellite of the earth is ___________.

1. Moon
2. Rohini
3. Aryabhatta
4. Sputnik

Q.

Stars are only present in the sky during the night.

1. False

2. True

Q.

Stars are celestial bodies that emit light of their own like our sun.

1. False

2. True

Q.

Energy production in the stars is the result of chemical reactions.

1. False

2. True

Q.

Which of the following is true about the Pole star?

1. The Pole star revolves around other stars

2. All stars appear to revolve around the Pole star.

3. It is visible from the north pole.

4. It is visible from the south pole.

Q. The maximum mass of White Dwarf stars is 1.44 times the mass of the sun which is known as Chandrasekhar limit.

1. True
2. False

Q. is the star considered for navigational purposes by humans for centuries.

1. Polaris
2. Rigel
3. Orion
4. Sirius

Q.

_________ are celestial bodies that emit light of their own like our sun.

1. Stars

2. Satellite

3. Nebula

4. Black hole

Q.

The location of Pole star has made it a convenient object for navigators to use to determine North-South direction.

1. True

2. False

Q.

Are the colours of all stars in the Universe same as that of our Sun ?

Q. Consider the following statements:
(1) Stars are born in nebulae.
(2) Stars expand as they grow old.
(3) It will eventually collapse and explode.
Which of the statements given above is/are correct?

1. Only 1
2. 1 and 2
3. 1 and 3
4. All of these

Q. All animals, plants and micro-organism utilise energy to the Sun. Then at last the Sun ☀ lost its whole energy. Give Reason for your answer

Q. Young new stars have colour, while older stars have colour.

1. red
2. white
3. blue
4. black

Q.

Why can't we easily see stars and planets in the sky when we are in a city, but can see them clearly from elsewhere?

1. Because of the polluted air in the cities

2. The statement is not true

3. None of the above suits the explanation

4. City lights obstruct the light coming from stars and planets

Q.

The orbit along which the sun appears to move among the stars is called

1. planetary nebula

2. eclipse

3. ecliptic

4. path

Q. Do the heat we feel while walking in the afternoon is due to the nuclear fusion of the sun?

Q.

Why does the moon which is purely white in day time have a yellowish hue after sunset

Q. On $29$ October, the moon came out at $\underset{–}{}$ minutes past $\underset{–}{}$ o'clock.