Physics and Astronomy Online

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Physics & Astronomy Facts

The Sun’s Corona

The White-Light Corona - The Corona is the Sun's outer atmosphere. It is visible during total eclipses of the Sun as a pearly white crown surrounding the Sun. The corona displays a variety of features ...

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 ...
The target chamber inside which NIF
The World's Largest Laser

In a rural community in Northern California, in a building spanning the length of two football fields scientists are creating the world's largest laser. The National Ignition Facility project, know as ...

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