Hot, bright stars generate harsh stellar winds that are blast ultraviolet radiation toward a protostar, sculpting it into the light-year-long shape seen here.
When Phobos passed in front of the sun, it created an annular or "ring" eclipse. That is, the sun's surface appeared in a ring around the little moon in silhouette.
A 7.0-magnitude earthquake struck near Adak, Alaska earlier today (August 30, 2013). No immediate reports of injuries or serious damage. No tsunami warning.
As of August 28, the fire is 20% contained. Thousands of firefighters are still battling the blaze, which has burned 184,481 acres near Yosemite National Park.
This chart shows how we on Earth see Comet ISON in front of the background stars, as it falls toward the sun, moving from the outer to the inner solar system.
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.