The Astronauts Memorial Foundation honors all American astronauts ________ have lost their lives while on missions or in training.

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.

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 ___________________________________________.

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.