Description: Materie ist alles, was Raum einnimmt und eine Masse hat. Die bekanntesten Aggregatzustände der Materie sind fest, flüssig, gasförmig und als Plasma. Durch Erhitzen oder Abkühlen eines Stoffes ändert sich sein Aggregatzustand von einer Form in eine andere. Die Menge der Materie wird in Masseneinheiten gemessen, z. B. in Kilogramm (kg).

Term and definition status: The original definition of this term in English have been approved by a research astronomer and a teacher
The translation of this term and its definition is still awaiting approval

The OAE Multilingual Glossary is a project of the IAU Office of Astronomy for Education (OAE) in collaboration with the IAU Office of Astronomy Outreach (OAO). The terms and definitions were chosen, written and reviewed by a collective effort from the OAE, the OAE Centers and Nodes, the OAE National Astronomy Education Coordinators (NAECs) and other volunteers. You can find a full list of credits here. All glossary terms and their definitions are released under a Creative Commons CC BY-4.0 license and should be credited to "IAU OAE".