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Physics & Astronomy Facts

Magnitude of an Astronomical Object

'Visual magnitude' is a scale used by astronomers to measure the brightness of a star. The term 'visual' means the brightness is being measured in the visible part of the spectrum, the part you can se ...
Launched on June 30, 2001, WMAP maintains a distant orbit about the second Lagrange Point, or
The Oldest Light in the Universe

A NASA satellite has captured the sharpest-ever picture of the afterglow of the big bang. The image contains such stunning detail that it may be one of the most important scientific results of recent ...

Sputnik and The Dawn of the Space Age

History changed on October 4, 1957, when the Soviet Union successfully launched Sputnik I. The world's first artificial satellite was about the size of a basketball, weighed only 183 pounds, and took ...

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