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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| Baade’s Window |
An area of sky around the globular cluster NGC 6522 in the constellation Sagittarius, which is particularly rich in stars. The German-American astronomer Walter Baade 1893-1960 drew attention to the area and correctly deduced that it is a region in the disc of our Galaxy relatively clear of interstellar material through which very distant stars in the Galaxy’s nuclear bulge can be seen.
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