Constellations
Meet Crux, the constellation of the Southern Cross
Crux, the constellation of the Southern Cross, is a hallmark of southern skies and contains the open cluster known as the Jewel Box.
Earth
Can earthquakes be triggered by intense weather?
A new study from MIT shows that climate and intense weather events like heavy snowfall and rain helped produce a swarm of earthquakes in Japan starting in 2020.
Brightest Stars
Sun

Sun news for May 12: X flare potential is high! More auroras tonight?

Sun news for May 12, 2024. We might have a repeat of Friday's solar superstorm tonight. More CMEs are on the way to Earth. The chances for another X flare today are 75%!
Astronomy Essentials
Tonight

Visible planets and night sky guide for May

Visible planets and night sky guide for May 2024. See the waxing crescent moon near Castor and Pollux, the twin stars of Gemini, tonight.
Brightest Stars

Mimosa, 2nd-brightest star in Crux, the Southern Cross

To see Mimosa, you need to be in the Southern Hemisphere, where it is a prominent star, or at the latitude of New Orleans, Hawaii, Cairo or New Delhi.
Earth
Human World
Sun

Auroras last night wowed millions! Pics here

Auroras last night from "extreme" geomagnetic storming - which came after a week of very high activity on the sun - wowed millions around the globe.
Sun

Giant sunspot region now visible in eclipse glasses

Did you save your eclipse glasses from the April 8 total solar eclipse? If so, grab them to check out giant sunspot region AR3664, now facing Earth!
Earth

Orangutan treats his wound with a medicinal plant

In a first, a Sumatran orangutan treated his wound with a plant with known medicinal properties. Read more about this new doctor in the forest.
Space

Plunge into a black hole in this new video

Plunge into a black hole in this new video from NASA. See what it would look like to cross the event horizon of a supermassive black hole.
Astronomy Essentials

Retrograde motion can be real or illusory

Retrograde motion of planets like Jupiter or Mars in our sky is an illusion, a trick of perspective. But there's a real retrograde motion, too.