1The planets are in the solar system.
2The Moon revolves around the Earth.
3The Sun is a planet in solar system.
4 Man first walked on the Moon in 1969.
5 Venus is a planet.
6 We can send rockets into space.
7 The stars are part of space.
Ex 2.
1 space
2 orbit
3 more than five months to reach the planet Venus.
4 far -fetched
5 obtained
6 rotates (revolves )
7 knowledge
8 satellite