We know our universe consists of gigantic galaxy clusters in space. And we know that looking far away in space equals looking back in time. Here's an early-universe prequel to a huge galaxy cluster.
Do galaxy collisions power quasars? UK astronomers have evidence suggesting they do. If so, then our own Milky Way galaxy might someday become a quasar.
The Senate held a new congressional UFO hearing on April 19, 2023. It focused on the Pentagon's program AARO but also revealed interesting new videos and data.
Occasionally you get the chance to look for a very young moon, less than 24 hours old. Those in North America, may see one just after sunset on April 20.
A geomagnetic storm is a disturbance in Earth's magnetic field, caused by activity on the sun. The current solar cycle number 25 has triggered a few of them.
Scientists have identified a 200,000-light-years-long trail of young blue stars - a star bridge - linking a runaway black hole and the galaxy it's escaping.
On March 17, 2023, near-Earth asteroid 2023 EY will sweep closely past Earth, coming within about 62% of the moon's distance. You can watch it live here!
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.
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