For the past three years, Antarctic sea ice at maximum set records. This year, that didn't happen, and a sea ice scientist called it "a return toward normalcy."
Astronomers say the two stars might be heading for catastrophe. They will likely either merge to create a single giant star or form a double black hole.
Venus is the brightest one up before dawn, but Mars and Jupiter were closer on Saturday than they will be again until 2018. Plus many people caught Mercury!
Meet the Coalsack Nebula, a cloud of dust and gas in space - birthplace for new stars. In millions of years, the Coalsack's stars will light up and shine brightly.
The flybys are part of a series of "lasts" for Cassini, whose mission to Saturn ends next year. Last chance for many years to see new up-close views of this fascinating, geologically active Saturn moon.
Astronomers studied 35 galaxies with a newly upgraded radio telescope in New Mexico to learn more about galactic halos. This study confirms a 1961 prediction.
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.