Question

Which of the following has light of its own ?
(a) Planet
(b) Star
(c) Moon
(d) Mars
Which one of the following is a satellite ?
(a) Sun
(b) Moon
(b) Earth
(d) Jupiter​

Answer 1

Answer:

1. star and 2 is the moon

Explanation:

The Moon is Earth's only proper natural satellite. It is the fifth largest satellite in the Solar System, larger than any dwarf planet and the largest natural satellite in the Solar System relative to the size of its planet, at a quarter the diameter of Earth, comparable to the width of Australia. Wikipedia

Stars make their own light, just like our sun (the sun is a star — the closest star to Earth). But the stars are very, very far away from our solar system so they appear to be very tiny to us, even though up close they are large. ... They reflect the light of the sun in the same way our moon reflects sunlight.

Answer 2

Answer:

Question 1:

(b) Star has light of its own.

Explanation:

• Stars are celestial bodies that are mostly made up of hydrogen and helium.
• They can also be called glowing balls of gases.
• Just like our Sun, all the other stars too produce their own light by nuclear fusion.

Explanation for incorrect options:

(a) Planet

• The core of planets is made up of elements heavier than hydrogen.
• This prevents nuclear fusion and hence release of light energy.
• Therefore, planets do not have light of their own. They reflect the light from their parent star.

(c) Moon

• The moon is Earth's natural satellite.
• It is said that the moon was created by accumulation of debris left by a collision.
• The moon's surface is rocky and it neither has a core, nor an atmosphere.
• Hence, the moon does not have any light of its own but reflects the Sun's light.

(d) Mars

• Planets do not have light of their own.
• They reflect the light from their parent star.

Question 2:

(b) Moon is a satellite.

Explanation:

• An object that orbits a planet is called a satellite.
• A natural satellite is an astronomical object that is orbiting a planet and isn't placed there by man.
• The moon was formed by the accumulation of left over debris from a collision.
• Therefore, moon is a natural satellite.

Explanation for incorrect options:

(a) Sun

• The Sun is the parent star of our solar system.
• All the planets revolve around the sun.

(b) Earth

• The Earth is the third innermost planet of our solar system.
• Earth revolves around the Sun.

(d) Jupiter

• Jupiter is one of the outer planets of the solar system.
• It is the fifth planet and revolves around the Sun in an elliptical orbit.

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