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 |
|---|---|
| Tdb |
Abbreviation for barycentric dynamical time. The order of the initials is that of the term in French.
See also: dynamical time.
|