SUNSET: 
Asteroid Ceres Was Radioactive — and That Could Explain a Lot
Radioactive heating in this asteroid's early days may have destabilized the small world, creating asymmetric surface features.
Perseids Are Coming, Full Moon or Not
Don't use a full Moon pass to skip this year's Perseid meteor shower. Right here, right now, we're going to help you make the most of it.
Webb Telescope Shatters Distance Records, Challenges Astronomers
Distant galaxies in Webb images suggest we need to rethink star and galaxy evolution in the early universe.
Caught in a Solar Storm on the Way to Mars
A chance alignment between Earth and a Mars-bound spacecraft has given us a rare glimpse at the motions of high-energy particles from the Sun.
This Week's Sky at a Glance, August 5 – 13
The Moon and Saturn come to opposition this week, showing us their full sunlit faces. Jupiter looms big late in the night, Vega attains the zenith, and we cross the midpoint of summer. The Perseid meteors get partly mooned out.
Korea's Lunar Orbiter Heads for the Moon
South Korea's lunar orbiter has launched successfully for the Moon, joining a growing number of missions there.
Hubble's Future in the Webb Era
Even though it's far past its warranty, Hubble is still proving its worth in this new era that includes the James Webb Space Telescope.
August: Saturn & the Perseids
August marks the return of the Perseid meteor shower — and as you’re looking out for shooting stars while listening to this month’s Sky Tour podcast, look for Saturn low in the southeast as soon as night begins to fall.
Why Are Jupiter's Rings So Thin?
Why does the biggest planet in the solar system have such flimsy rings? New research shows Jupiter's moons may be to blame.
Thin Red Lines: Webb Space Telescope Captures Star Creation on Grand Scale
New imagery from the James Webb Space Telescope shows a nearby galaxy in a whole new light.
This Week's Sky at a Glance, July 29 – August 6
As the Big Dipper dips and the Guardians of the Pole align one over the other, Saturn looms low in the southeast and the False Comet teases at its highest.
Black Widow Pulsar Sets Mass Record
A pulsar has devoured enough of its stellar companion to grab the title for most massive known neutron star.
Solving an Earthshine Mystery
Something we take for granted about the crescent Moon's appearance may be nothing more than an optical illusion.
When Planets Collect Comets
What kind of planets are likely to ensnare comets coming in from the icy outer reaches of a planetary system?
This Week's Sky at a Glance, July 22 – 30
Bright Arcturus is still pretty high after dark, but as summer progresses, it moves down the western side of the evening sky. Its pale ginger-ale tint always helps identify it.
Giant Black Holes Make Tiny, Ghost-like Particles
Blazars, the gas-guzzling black holes at the center of galaxies, could make most of the tiny particles known as neutrinos we catch on Earth.
Radio “Heartbeat” Teases Fast Radio Burst Origins
Scientists have observed pulses from a fast radio burst, suggesting the flash might have come from a neutron star.
A Black Hole Lurks in a Galaxy Near Our Own
Astronomers have found a dormant black hole orbiting a massive blue star in the Large Magellanic Cloud, a satellite galaxy of the Milky Way.
This Week's Sky at a Glance, July 15 – 23
The waning Moon says hi to late-night Saturn, the Teapot starts tilting, the Great Square thrusts up, and the Milky Way arches high.
See a Rare Transit of Iapetus on July 17–18
It's tiny. It's challenging. But you won't get the chance to see Iapetus transit the globe of Saturn again until 2037!
