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 |
|---|---|
| Billion |
In scientific usage, a thousand million 10 to the power of 9. Formerly, billion was used in the UK to mean a million million, so care with interpretation is needed if there is any possibility of confusion.
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