Unit E: Space Exploration

One of the greatest hazards that humans in space face is cosmic radiation. Learn what cosmic radiation is, why it's dangerous, and ways that we are looking at protecting humans in deep space.

In planetary science, astronomers have found planets that orbit other stars, just like Earth orbits the Sun. Some of them might even be able to support life.

This backgrounder explains what noise is, how it is measured, and how it affects our hearing, wellness and more.

This backgrounder explains what light is, how it is measured, and how it affects people on Earth and astronauts on board the International Space Station.

Humidity is an important part of life on Earth and life in space. This backgrounder explains what humidity is, how it is measured and how it affects us both mentally and physically.

Do you like to look at the stars? What can you identify in the night sky? Try finding some important constellations tonight!

This backgrounder explains the difference between planets, dwarf planets and small solar system bodies, such as asteroids and comets.

If an asteroid were to hit the Earth it could be disastrous. Here are some ways we could protect ourselves.

Find out how asteroids, space debris, and cosmic radiation can be dangerous, and how to monitor them and protect ourselves from these space hazards.

Why do a baseball and a rocket need the same launch speed to get from Earth into space? It has to do with physics and gravitational force.