Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Southern lights over South Pole
Hunter Davis sent these photos from Antarctica this morning of the aurora australis - or southern lights - now appearing over Earth's South Pole.
April 11, 2017
Watch for Venus before dawn
While watching Jupiter and the moon around April 9-11, don't forget Venus! It passed between us and the sun on March 25 and now blazes in the east before dawn.
April 10, 2017
Jupiter and its moons
The 4 largest moons of Jupiter - called the Galilean satellites - are Io, Europa, Ganymede and Callisto. Recent photos here.
April 9, 2017
Raindrops like tiny suns
After a spring rain .... in this photo by John Entwistle, raindrops sparkle like tiny suns.
April 8, 2017
New Hubble image of Jupiter
Jupiter is the largest planet in our solar system - some 88,789 miles (142,984 km) at its equator. We pass between Jupiter and the sun this week, and Hubble Space Telescope looked its way.
April 7, 2017
Red ring of light over Eastern Europe
The enormous ring of light that appeared in the night sky on April 2 - above a thunderstorm in the Czech Republic - was a rare and fleeting lightning phenomenon.
April 6, 2017
Milky Way and zodiacal light
Which one looks brighter to you? One is the combined light of many stars. The other is the light of our own star, the sun, reflecting on grains of dust.
April 3, 2017
Seahorse aurora
Seeing a seahorse shape in the shifting light of an aurora is an example of "pareidolia."
April 1, 2017
Sun halo over snowy Cape Breton Island
Winter still lingers on Cape Breton Island, Canada. Photo by Kris Tynski.
March 30, 2017
March 28 very young moon
It's rare to see a moon less than 24 hours old, that is, 24 hours past the new phase. But North America had a shot at a younger moon on the night of March 28.
March 29, 2017
