Have you ever heard of snow rollers? We hadn't either. They're like the snowballs people roll to make snowmen. But, instead of people, nature rolls them.
Only a few of the original, sometimes-glinting Iridium satellites are still in low Earth orbit. They have 3 reflective panels that occasionally catch the sun and produce a visible flare lasting between 5 and 20 seconds.
What if we learned an asteroid was headed toward Earth? How much energy does it take to destroy an asteroid and break it into pieces? More than we thought, it turns out.
Polaris - aka the North Star - is in the center of the great turning wheel of stars in this photo. It's the star around which the entire northern sky appears to turn.
James Figge of Delmar, New York captured this image on February 23, 2019 - from the comfort of his home - with the Harvard-Smithsonian 6-inch robotic telescope in Arizona.
Researchers used Gaia data to find a stellar stream of at least 4,000 stars that have been moving together in space since they formed, about a billion years ago.
Deborah Byrd (asteroid 3505 Byrd) helps edit EarthSky.org and is a frequent host of EarthSky videos. Deborah created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Prior to that, she had worked for the University of Texas McDonald Observatory since 1976, and created and produced their Star Date radio series. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named in her honor in 1990, a Public Service Award from the National Science Board in 2003, and the Education Prize from the American Astronomical Society in 2020. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.