What is a meteor made out of?

Describe the orbit of comets.

What happens to a meteor when it enters the Earth's atmosphere?

What is a comet?

What is a asteroid?

Where are black holes formed?

Why can you not see a black hole?

Describe a black holes' mass and size.

How centripetal force act?

What is the source of centripetal force?

Name a 3 advantages of using a unmanned probe.

Name a disadvantage of taking humans in spacecraft.

Name a benefit of astronauts living in pressurised spacecraft.

Why does a space suit have a dark visor?

There is no oxygen in space, how does the suit solve this problem?

The surface of the suit face the sun can become how hot?

The suit facing away from the sun can become how cold?

When travelling in space, what happened the to gravitational forces compared to Earth?

Name a disadvantage of using a unmanned probe.

What speed does light travel at?

How long does it take for light from the sun to reach the Earth?

How long does it take for light to get here form the nearest star?

When does America plan to go to mars and how much will it cost?