Radioactivity is an essential topic to study in space school.
Mysterious rays and particles were discovered to be emitted from the nuclei of atoms.

What causes radioactivity? How is it measured? Why does it harm us? Can it be used to help us? Does it cause problems for astronauts?

All these questions will be addressed in this exciting space school topic.

Radioactive isotopes decay in what is called chains to the stable isotope of lead.

Knowing  the half life of these radioactive elements  the ages of ancient objects can be determined.

Radiocarbon dating is one method another is to look for the "time crystals" of zircon which can help find the ages of rocks and thus the planet and solar system itself.