Space exploration began with the launch of Sputnik and Astrophysics was born as the application of physics to the phenomena observed by Astronomy, which etymologically means laws of the stars.
There are 2759 entries in this glossary.| Term | Definition |
|---|---|
| Delta Cephei |
A yellow giant star in the constellation Cepheus that varies in brightness between magnitudes 3.6 and 4.3 over a period of 5.37 days, and is the prototype of the Cepheid variable stars.
|