The unmanned space crafts which are used to explore celestial bodies are called

Jupiter, Saturn, Uranus and Neptune are regarded as

The time which sunlight takes to reach the earth is

The shape of the 'moon' is

A huge mass of very hot gases is called

The optical instruments that are used to explore and observe celestial objects include

The moonlight is a reflected light of

A system which is made up of planets, asteroids and other objects orbitting the sun, is known as

The heavenly bodies which revolve around the sun are called

The moon which appears, after disappearance on completion of lunar month is called

Mankind refers to the

Due to less concentrated energy, the regions that are away from equator do not have much

The time which earth takes to complete its one revolution is

After sun, the nearest star to earth is called

Planets, moons, asteroids and stars are called

The atmosphere of earth is very rich in

At night, the planets Venus, Mars, Jupiter and Saturn can be seen with a

During lunar eclipse earth blocks out the

The earth spins on its own

Regions close to equator round the year experience