New Hubble Space Telescope image of Mars, in honor of the planet's May 22 opposition, when our planet Earth will sweep between the Red Planet and the sun.
New Horizons imaged this distant Kuiper Belt Object twice. It has learned its location and spin, and dispelled a theory that 1994 JR1 is a quasi-satellite of Pluto.
M13 is a densely packed globular cluster made of about 300,000 stars, more than 25,000 light-years from Earth. It's one of our galaxies most ancient inhabitants.
An advanced computer simulation suggests that newly forming Earth-like worlds are likely to suffer a giant impact, like that thought to have created our moon.
Data from a trio of satellites show rapid local changes in Earth's magnetic field. The cause is likely accelerations in the flow of liquid iron near Earth's core.
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.