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.
A measurement of all the starlight ever produced
How much starlight has our universe produced? According to a new study, stars have radiated 4x1084 photons since the start of the universe 13.7 billion years ago. That's the number 4 with 84 zeros behind it.
December 5, 2018
Supervolcano eruption 20,000 years ahead?
Italy's Phlegraean Fields - one of Earth's most active and volatile volcanic regions - is readying for a catastrophic eruption, says new research. But not for thousands of years.
December 5, 2018
The Double Cluster in Perseus
The Double Cluster in Perseus consists of 2 star clusters, each containing supergiant suns. Individually, the clusters are known as h and Chi Persei.
December 5, 2018
A giant relic of a disrupted tadpole galaxy
The tail of the "tadpole" is some 500,000 light-years long. If it were at the distance of the Andromeda galaxy - about 2.5 million light years from Earth - it would reach a fifth of the way to our own Milky Way.
December 4, 2018
OSIRIS-REx spacecraft arrives at Bennu
After traveling through space for more than 2 years, NASA’s OSIRIS-REx spacecraft arrived on Monday at its destination, asteroid Bennu.
December 3, 2018
See it! Moon and Venus close
The waning crescent moon swept past Venus Monday and Tuesday mornings. The EarthSky community caught photos!
December 3, 2018
Astronomers’ 1st close-up look near a supermassive black hole
For the 1st time, researchers have been able to observe the motion of gas clouds around a central supermassive black hole. This particular black hole powers the famous quasar 3C 273.
December 3, 2018
Some TRAPPIST-1 exoplanets may be like Venus
How habitable are the 7 Earth-sized exoplanets of the nearby star TRAPPIST-1? Updated climate models suggest some may be similar to Venus, but at least one world may have oceans like Earth.
December 3, 2018
Iridescent cloud with crepuscular rays
You'll see a true iridescent cloud when the sun is nearby. The colors will appear randomly distributed. Here's one with beams of light - crepuscular rays, or sunrays - appearing to shoot from it.
December 3, 2018
Live coverage of spacecraft arrival at asteroid December 3
The OSIRIS-REx spacecraft is scheduled to rendezvous with its targeted asteroid, Bennu, on Monday, December 3, 2018, at approximately 17:00 UTC (noon EST).
December 2, 2018
