Enjoying EarthSky? Subscribe.

219,555 subscribers and counting ...

Path of 2017 total solar eclipse, via Fred Espenak.

Total eclipse of sun: August 21, 2017

One year from today … the 1st total solar eclipse visible from the contiguous U.S. since 1979. Start planning now!

eclipse-annular-5-20-2012-red-bluff-california-Brocken-Inaglory-cp

Dates of lunar and solar eclipses in 2016

The next eclipse is an annular solar eclipse on September 1, 2016.

Image via NASA

Watch spacewalk live August 19

Two ISS astronauts will perform a spacewalk on Friday. NASA TV’s live coverage starts at 6:30 a.m. EDT (10:30 UTC) and lasts about eight hours.

Phobos, via Viking 1.  Image Credit:  NASA

Today in science: A moon for Mars

American astronomer Asaph Hall discovered Phobos, one of the two Martian moons, on this date in 1877. Did he imagine how well we’d see Mars’ moons today?

Image via www.sciencealert.com

Physicists confirm a possible 5th force

“If true, it’s revolutionary,” said Jonathan Feng, professor of physics and astronomy at University of California, Irvine and lead author of the new study.

This image shows the famous Pleiades cluster of stars as seen through the eyes of WISE, or NASA's Wide-field Infrared Survey Explorer.Image credit: NASA/JPL-Caltech/UCLA

Astronomers aim Kepler at the Pleiades

The famous planet-hunting Kepler spacecraft peered toward the beautiful Pleiades star cluster and measured the spin rates of hundreds of Pleiades stars.

An artist's concept of a Dyson sphere. Image via CapnHack, via energyphysics.wikispaces.com.

Tabby’s Star: More weirdness

Some astronomers think this star may have an alien megastructure – an energy-gathering Dyson sphere – around it. Here’s the latest.

White circles denote areas pinged by Cassini’s radar. Image via NASA JPL.

Saturn’s moon Titan has flooded canyons

They’re steep-sided canyons with liquid in them, but the liquid isn’t water. Instead, it’s liquid hydrocarbons.

Geminid meteor, Lovund, Nordland, Norway.
 Photo via Tommy Eliassen.

How high up do meteors start glowing?

Meteors begin to glow almost as soon as they hit Earth’s atmosphere, but tend to vaporize (burn up completely) at varying altitudes.

Taken during the 2015 Perseid meteor shower in August - at Mount Rainier National Park - by Matt Dieterich.  He calls the photo 'Skyfall.'

EarthSky’s meteor shower guide for 2016

The Perseid meteor shower probably peaked on the night of August 11-12. Look for meteors tonight, too, and especially in the hours before dawn on August 13.