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.
Use Pegasus to find Andromeda galaxy
The wonderful Andromeda galaxy! Most distant object we can see with the eye alone. Try using the Great Square of Pegasus to find it in a dark sky.
November 8, 2017
Nickname New Horizons’ next target
The craft that flew by Pluto in 2015 is heading for the Kuiper Belt object 2014 MU69. NASA and the New Horizons spacecraft team want you to help nickname it.
November 7, 2017
2016 greenhouse gases at record high
As climate talks open in Bonn, Germany this week, negotiators are considering a report from the World Meteorological Organization, urging action now.
November 7, 2017
2017 ozone hole smallest since 1988
This year's ozone hole peaked in September at its smallest observed extent since 1988, due to an unstable and unusually warm Antarctic vortex in 2017.
November 7, 2017
The Small Magellanic Cloud orbits our Milky Way
You need to be in Earth's Southern Hemisphere to see the Small Magellanic Cloud. It looks like a luminous cloud, but it's really a dwarf galaxy.
November 6, 2017
Next Mars rover will have 23 eyes
Cameras have come a long way since the first Mars rover in 1997. The newest Mars rover from NASA - on the Mars 2020 mission - will have a wider field of view, plus more color and 3-D imaging.
November 5, 2017
A famous variable star in Cepheus
With clock-like precision, the star Delta Cephei doubles in brightness every 5.36 days. You can notice this brightness change with the eye alone.
November 5, 2017
Moon hides bright star Aldebaran
As seen from around the world, the moon and star Aldebaran will cross the sky together on this night. From parts of the world, the moon will pass in front of Aldebaran.
November 5, 2017
See it! Full Hunter’s Moon
This weekend's Hunter's Moon, as captured by EarthSky friends around the world. Thank you to all who submitted photos!
November 4, 2017
Astronomers complete 1st global asteroid tracking drill
This is only a test. Astronomers report on the TC4 Observation Campaign, which, in October, used a real Near-Earth Asteroid to practice our global response to a potential asteroid threat.
November 4, 2017
