High above sea level - and far from light pollution - Tibet offers one of the most breathtaking night skies in the world. A collection of photos by Jeff Dai.
Venus appears as a crescent for the same reason the moon does. It's because, at times like now, its lighted side - or day side - is facing mostly away from us.
A spacecraft using Comet Hitchhiker orbits and lands on multiple comets and asteroids using a harpoon and tether and the energy of motion of the small bodies themselves.
Venus has returned to the east before dawn. Mars is up there, too, but not nearly as bright. See Venus, and capture Mars now with binoculars or in photos.
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.