Iridium flares come from iridium communications satellites. They happen when an antenna from one of these satellites reflects sunlight directly down at Earth.
J1649+2635 is one of only four galaxies known to have both spiral arms and jets of subatomic particles propelled outward from its core at nearly light speed.
Galaxies in thread-like filaments within the cosmic web have a much higher chance of actively forming stars. So galaxy evolution was accelerated in the filaments.
A comprehensive, 21-year analysis reconciling four different techniques. A word about this year's sea ice extent. And why is info about Antarctica so hard to come by?
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.