Join each pair of sentences into one, using the prompts provided.

We are meeting an astronomer tonight. This astronomer has discovered three Earth-like planets.

→ The astronomer ___________________________________________.

As soon as the spacecraft________ into space, the crew started to observe the sun.

Christer Fuglesang said he enjoyed floating around in the _____ environment.

The launch of the Space Shuttle Endeavour _____ broadcast live this morning.

Last week they visited a museum. The first artificial satellite is on display there.

→ Last week they ___________________________________________

The Milky Way is just a ______ in the universe and it contains our Solar System.

Choose the correct option A, B, C, or D to complete the sentences.

The first _______ was done by Alexei Leonov, a Russian cosmonaut on March 18th, 1965. It was 10 minutes long.