The blue planet .
Name the first spacecraft that landed on planet Mars.
Voyager
Viking
Mir
Who was the first man to go in space?
Yuri Gagarin
Edwin Hubble
Neil Armstrong
India's first artificial satellite.
Sputnik-1
The first man - made satellite .
Which is one of the coldest planet?
Which planet has a small rocky core ?
Which is nearest to the sun?
The path of a planet is called:
