Astrophysics terms starting with M

9 terms

1. Main Sequence Star A star that lies along a continuous band, known as the main sequence, extending from the upper left (hot, bright stars) to the lower right (cool, dim…
2. Mass Defect When two subatomic particles are bound together, their bound mass is slightly different than their mass if each particle is measured separately.
3. Matter-Dominated Universe When the density of matter is greater than that of any other component.
4. Meson A kind of matter made from an even number of quark-antiquark constituents. The basic structure of most mesons is one quark and one antiquark.
5. Metastable Energy Density A theorized transient energy, often preceding a phase transition.
6. Mid-Class Explorer (MIDEX) NASA's Mid-Class Explorer.
7. Milky Way The galaxy in which the Earth is found. When viewed from the Earth and its environs, it appears in the night sky as a hazy band of white light (hence…
8. model See Exhibit.
9. Muon The second heaviest charged lepton (with electron and tau), with electric charge -1.