Earth’s Highest Clouds Shine at the “Top of the Orbit”

by Jason Major August 20, 2013

Looking for a new desktop background? This might do nicely: a photo of noctilucent “night-shining”¬†clouds seen above a midnight Sun over Alaska, taken from the ISS as it passed over the Aleutian Islands just after midnight local time on Sunday, August 4. When this photo was taken Space Station was at the “top of the […]

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by Fraser Cain September 14, 2010

No, this isn’t a movie about robots. The terminator is the line that separates day from night on an object lit by a star. You can see evidence of this terminator when you look at the Moon. When we see the Moon, half in light and half in darkness, we’re seeing the terminator line going […]

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