SUNSET: 
Jupiter's Great Red Spot Just Keeps Getting Smaller
Jupiter's Great Red Spot may be reaching a milestone this year by shrinking to its smallest size in recorded observational history.
Atomic Oxygen Detected on Venus
New data provide direct evidence for the existence of atomic oxygen in Venus's upper atmosphere, enabling new science on our sister planet.
Lucy Mission Flies By Asteroid Dinkinesh, Finds Binary Moon (Updated)
The Lucy mission's flyby of the main-belt asteroid Dinkinesh resulted in a surprise — yet another asteroid moon!
Bits of Theia Might Be in Earth's Mantle
A "smoking gun" for the ancient calamity that formed Earth’s large Moon may still exist deep in the mantle of our planet.
New Forecast Resets Solar Cycle Expectations
A new forecast suggests that sunspot numbers, aurorae, and other solar activity will peak sooner and at a higher level than expected.
How to See Freaky Starlink "Cluster Flares", Plus the Latest on Comet Lemmon
Alien invasion or flares from satellites in multiple orbits? It depends on your point of view. We also check in on Comet Lemmon, poised to possibly reach binocular-visibility.
Marsquake Reveals Molten Layer Above Martian Core
An impact far from NASA's Insight lander on Mars set off seismic waves that revealed new details about the Martian interior.
Striking New Views of Jupiter and Its Moon Io
The James Webb Space Telescope and Juno mission turned their eyes to Jupiter and its volcanic moon Io, revealing fine details.
Orionid Meteors Fly; Two Moons Shadow Jupiter
Bundle up and enjoy the Orionid meteor shower under moonless skies this week. Don't miss the warm-up act, either, when two of Jupiter's moons pair up in a captivating double-shadow transit.
Unearthing a Solar Storm in Ancient Alpine Trees
Ancient pine trees hold the record of an atmospheric event 14,373 years ago. The only known explanation is a massive solar storm.
Psyche Mission Is on the Way to Psyche, the Asteroid
The Psyche mission launched today, on its way to rendezvous with the asteroid of the same name in 2029.
First Look at Material from Asteroid Bennu on the Ground
The Osiris-REX sample collection team reveals the first look at material collected from the asteroid Bennu.
“Planet X” May Have Left Our Solar System Billions of Years Ago
A new understanding of far-off worlds in the outer solar system suggests that if "Planet X" ever existed, it has long since left the vicinity.
Comet Hartley Comes Home Again; Gegenschein-gazing
Get acquainted with Comet 103P/Hartley. It's been a dozen years since its last bright apparition. While you're at it challenge yourself to spot the elusive gegenschein.
Psyche Asteroid Mission Set for Launch October 5th
NASA’s newest mission is bound for the metallic asteroid of the same name. The metal-rich rock offers us a view of asteroid interiors.
Osiris-REX Capsule Returns Samples of Asteroid Bennu to Earth
Samples taken from the asteroid Bennu are now safely on Earth.
Action-packed Sky: Saturn, Comet Nishimura, and More
September is Saturn's time to shine. We also check on Comet Nishimura — now at 5th magnitude and still brightening — and look forward to a dramatic asteroid occultation. Not to mention that Jupiter just took another hit.
Rubble-Pile Asteroid Bennu Has Layers
The asteroid Bennu is a so-called rubble pile, but new results from NASA's OSIRIS-Rex mission indicate this heap of rubble has layers.
Solar Cycle May Trigger Clouds on Neptune
Nearly 30 years of observations indicate that Neptune’s clouds and brightness vary with the Sun’s activity.
New Comet Nishimura May Become Naked-Eye Bright
Comet Nishimura is quickly brightening in the morning sky and may be faintly visible with the naked eye next month. And on August 24th observers in North America will be treated to an occultation of Antares.
