Astronomy Picture of the Day · September 9, 2009

Star Trails Over Oregon

The Astronomy Picture of the Day for September 9, 2009 is “Star Trails Over Oregon,” an image. The picture is copyrighted by its creator (Credit & Copyright: Joshua Bury). The original explanation runs about 130 words.

From the explanation

“As the Earth spins on its axis, the sky seems to rotate around us. This motion, called diurnal motion , produces the beautiful concentric trails traced by stars during time exposures.”

— APOD editors, September 9, 2009

Read the full explanation on science.nasa.gov

At a glance

Date: September 9, 2009
Type: Image
Credit: Credit & Copyright: Joshua Bury
Copyright: Copyrighted by the credited creator. Ask the copyright holder before reusing it.
Explanation length: About 130 words

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Source

Astronomy Picture of the Day, September 9, 2009 — science.nasa.gov/image-article/apod-2009-september-9-star-trails-over-oregon

Copy taken Oct 28, 2026, 2:39 AM EDT. The image and explanation belong to their creators. OpenOrbit is not affiliated with or endorsed by NASA.