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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| Emission Line |
A narrow wavelength range in a spectrum over which energy is emitted at a level above that of the surrounding continuum. Emission lines arise when transitions occur between different energy levels in the atoms or molecules of a gas, with a net release of electromagnetic energy. atom, continuous spectrum.
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