A webcam on ESA’s Mars Express has acquired an unprecedented catalog of more than 21,000 images, providing a global survey of unusual, high-altitude, martian clouds.
Less than 24 hours left to get your 2018 EarthSky lunar calendar 25% OFF. Purchase at The EarthSky Store. 100's of people have already started receiving their calendars, thanks for the support!
First quarter moon comes at 22:22 UTC today (at U.S. time zones: 6:22 p.m. EDT, 5:22 p.m. CDT, 4:22 p.m. MDT and 3:22 p.m. PDT; translate to your time zone.
When a camera captures a star’s movement across the sky, it’s called a star trail. Fiona M. Donnelly captured this image on October 21, in Smiths Falls, Ontario. She wrote, "Our Earth's rotation during a one-hour period."
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