Scientists call them 22-degree halos, because the shining ring around the sun (or moon) has a radius of approximately 22 degrees.

FRB 121102 is one of the few known repeating fast radio bursts, and astronomers are trying to use this new period of activity to understand it better. Some predict the current active phase should end sometime between August 31 and September 9. Will it?

A new report concludes that large constellations of bright satellites in low-Earth orbit will fundamentally change ground-based astronomy and impact the appearance of the night sky for stargazers worldwide.

These next several evenings - August 27, 28 and 29, 2020 - watch for the waxing gibbous to flit by the gas giant planets, Jupiter and Saturn.

The 2 largest fires this week both began with lightning strikes.

A new study suggests there are more rogue, free-floating planets - unconnected to any star - than stars in our Milky Way galaxy. NASA's upcoming Nancy Grace Roman Space Telescope is expected to begin finding hundreds of them.

NOAA debunks some popular myths about lightning.

The Gulf of Mexico dead zone is much smaller than usual this year because Hurricane Hanna stirred up the area of low-oxygen water.

Every August, the Andromeda galaxy ascends in the sky during the evening hours. Here's how to use the Great Square of Pegasus to find it.

Poor Ophiuchus. Nobody ever claims him as a "birth sign," although the sun moves in front of his stars from about November 30 to December 18. Keep the big guy company. Find Ophiuchus in your sky tonight!