Contains:  Star trails
Just One Hour, Richard S. Wright Jr.
Just One Hour, Richard S. Wright Jr.

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Description

One hours worth of 30 second exposures combined to show how much the stars move in just one hour.

This image shows why we use an equatorial mount for long exposure astrophotography. As the Earth spins, the stars move considerably, and in this case you can see exactly how much in only an hours time. An equatorial mount works by aligning it’s axis of rotation with the Earth’s, and then rotating in the opposite direction of the Earth’s motion. It’s like being on a merry-go-round, and you have to turn your head to keep looking at someone or something off in the distance

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Just One Hour, Richard S. Wright Jr.