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 |
|---|---|
| Ramsden Eyepiece |
A telescope eyepiece consisting of two similar plano-convex lenses, convex sides facing and separated by a distance equal to two-thirds the sum of their focal lengths. This simple design suffers from chromatic aberration and, for astronomy, the Kellner eyepiece is preferred.
|