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 |
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| Narrow-Band Photometry |
The measurement of the magnitudes of stars in a set of narrow wavelength bands, typically less than 30 nanometres wide. The most commonly used narrow-band system is uvby photometry. The wavebands are isolated by means of standard filters. The narrow-band magnitudes can be used to determine basic physical properties of stars more simply and quickly than through spectroscopy, and are also useful for statistical studies on groups of stars.
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