The Earth in the Solar System — Social Studies STD 6 — Question

(i)

Satellite is the celestial body which has come into existence after separation from a planet. It does not have its own light and energy. It obtains light from the stars (the Sun).

(a)

Stars are the celestial bodies which have their own light and energy.

(ii)

They are small in size.

(b)

Stars are very huge and extensive balls of fire and gases.

(iii)

Number of satellites is 63 in our Solar System.

(c)

There are millions of millions stars in the universe. Sun is the only star in our Solar System.

(iv)

A satellite is also called a moon which has been separated from its planet.

(d)

Stars have their own light and energy (heat).

(v)

A satellite revolves round its planet.

(e)

Star revolves round its galaxy.

(vi)

Example: Moon.

(f)

Example: Sun.