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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| Harvard College Observatory |
The observatory of Harvard College, established in 1839. In 1847 it was equipped with a 0.38-metre 15-inch refracting telescope, which is still in its original building, the Sears Tower on Observatory Hill. In 1973, the Harvard-Smithsonian Center for Astrophysics was formed by combining the resources of the Smithsonian Astrophysical Observatory and Harvard College Observatory under one director, George Field.
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