SUNSET: 
Plan for the Next Total Solar Eclipse
Totality is addictive — once you've seen one total solar eclipse, you're hankering for the next one. Some exciting destinations are getting ready for their dances with darkness.
Best Test of General Relativity on Galaxy Scales
Astronomers have conducted the best, galaxy-scale test of general relativity yet, and it rules out some (but not all) theories of modified gravity.
Mars Dust Storm Grows — Curiosity's Skies Darkening
The dust storm on Mars that broke out at the end of May is now affecting the skies across the entire planet.
This Week's Sky at a Glance, June 22 – 30
Friday, June 22 • The waxing gibbous Moon this evening shines with bright Jupiter to its lower left and fainter Spica to its lower right. Saturday, June 23 • The bright "star" with the Moon tonight is Jupiter. Although they look rather close together, Jupiter is currently 1,800 times…
Where to Watch the Lunar Eclipse Online
If you're not in the right place in the right time, you can still view Wednesday morning's total lunar eclipse online via several live streams. We list several options here.
Explore the Night with Bob King
Make the Most of January's Total Lunar Eclipse
An unusual dawn total lunar eclipse presents special challenges and great photo opportunities. Here's what you need to know to make the most of it.
Astronomy in Space with David Dickinson
NASA Unveils New Power Source for Space Exploration
The Kilopower fission reactor will offer a more efficient and more powerful portable power source for solar system exploration.
Explore the Night with Bob King
Michigan Meteorite Tally Multiplies
They look like leftover gravel from a freshly laid asphalt road, but the black stones that spattered across the snow in the wake of the January 16th Michigan fireball were anything but terrestrial. They belonged to a tiny asteroid on a recent foray to the outer asteroid belt but now…
Hunters Recover Meteorites From Michigan Fireball
A spectacular fireball seen by hundreds of people from Iowa to Ontario delivered precious samples from the asteroid belt to the lake country of southern Michigan Tuesday night.
Some Plants Grow Well in Martian Soil
Astrobiology students cultivated leafy greens, sweet potatoes, and even hops in simulated Martian dirt.
Fantastic Year for Geminid Meteor Shower
Mark the date: December 13th. That's the night the Geminid meteor shower peaks. Highlighted by the return of its parent asteroid 3200 Phaethon, this year's show promises to be one of the best ever.
Astronomy in Space with David Dickinson
Voyager 1 Fires Dormant Thrusters
NASA engineers directed the historic spacecraft Voyager 1 to fire its backup thrusters for the first time in 37 years.
A Deeper View of Hubble’s Ultra Deep Field
The iconic image of faraway galaxies, and one of the most-observed regions of space, has just received a spectroscopic upgrade.
Atmosphere, Not Lava Flows, for Exoplanet 55 Cancri e
Previous studies of 55 Cancri e haven’t been able to determine whether this super-Earth hosts an atmosphere. A new study settles the question.
LIGO Sees Smallest Black Hole Binary Yet
LIGO has detected another black hole merger, raising the tally to five.
Astronomy in Space with David Dickinson
NASA Completes Parachute Test for Mars 2020 Rover
A suborbital launch from Wallops Flight Facility tested a critical piece of landing hardware for the Mars 2020 rover.
Planet Orbits Quiet Star 11 Light-years Away
Astronomers have discovered a potentially rocky planet around a red dwarf star just 11 light-years away.
Update on `Oumuamua, Our First Interstellar Object
The arrival of an object from beyond the solar system caught astronomers by surprise — but that doesn't mean that they were unprepared to study it.
China's Tiangong 1 Space Station to Burn Up
Early next year, an international team will track the uncontrolled atmospheric reentry of Tiangong 1, China's first prototype space station.
The Star That Wouldn’t Die
Observations of a stellar explosion that refused to fade away have astronomers scratching their heads. What created the blast — and could it explain massive black holes?