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Physics & Astronomy Facts

What does a piece of space dust look like? This picture shows one that is only 10 microns across. It was captured by a U2 aircraft in the stratosphere.
Uncharted Meteors

In 1967, NASA's Mariner 4 spacecraft was cruising through the solar system, not far from Earth, when something unexpected happened. 'Mariner 4 ran into a cloud of space dust,' says Bill Cooke of the M ...
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 ...

Right Ascension & Declination

Right Ascension (abbreviated R.A.) and Declination (abbreviated Dec) are a system of coordinates used by astronomers to keep track of where stars and galaxies are in the sky. They are similar to the s ...

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