Astronautics Vocabulary

The Astronautics Vocabulary is a glossary of terms that pertain to the science and technology of spaceflight. This alphabetical list can be navigated by clicking on the letters A-Z displayed on this page.

Definition of ordinary matter

Translation: matière ordinaire

Definition: Made up mainly of protons and neutrons, this matter is like everything we see around us here on Earth. It is thought to account for only a small percentage of the matter in the universe. (See dark matter and dark energy.)

Other Definition: None

Synonym: None