Nadir

by Dominic Ford, Editor
Last updated: 23 Feb 2019

The nadir is the point in the sky vertically straight below the observer's feet.

One of the most interesting planets in the solar system can be found there – the Earth. A telescope is not needed to see it since its disk is quite apparent to the naked eye, measuring 180° across. In fact, it is so large that it occults half of the sky.

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Ashburn

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39.04°N
77.49°W
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