sun
Earth’s Lightning Ramps Up With The Solar Wind: Study
As the northern hemisphere enters the hazy days of summer, thunderstorms will freckle many of our nights and days. What…
Observing Alert: See Mercury’s Best Evening Show of the Year
Don't let furtive Mercury slip through your fingers this spring. The next two and a half weeks will be the best…
This Was the Best Watched Solar Flare Ever
Are giant dragons flying out of the Sun? No, this is much more awesome than that: it's an image of…
Spectacular Aurora Sneaks in Quietly, Rages All Night
Expect the unexpected when it comes to northern lights. Last night beautifully illustrated nature's penchant for surprise. A change in…
Aurora Alert: Powerful Solar Flare This Weekend Could Spark Show Tomorrow
If you sit at a fairly high latitude, you may want to keep an eye out your window Tuesday (April…
Astrophotos: Sun Halo, Crescent Moon and Earthshine
Here's a few great astrophotos for today! Astrophotographer César Cantú from the Chilidog Observatory in Monterrey, Mexico captured this stunning…
Yesterday’s Mammoth Solar Flare Is The Biggest Of 2014 So Far
She's a rainbow! You can see the first moments of a huge flare belching off the sun in the picture…
Dazzling New Views of a Familiar Cluster
Wow. It’s always amazing to get new views of familiar sky targets. And you always know that a “feast for…
A Mesmerizing Look at Year 4 of the Solar Dynamics Observatory
Four years ago today, the Solar Dynamics Observatory embarked on a five-year mission to boldly go where no Sun-observing satellite…
Giant sunspot convulses but all quiet on the aurora front … for now
What a crazy sunspot cycle. Weeks go by with only a few tiny spots freckling the sun, then all at…