SUNSET: 
Fireball May Have Dropped Meteorites in Ontario
A lime-green meteor as bright as the full Moon streaked across Canadian skies on July 24th and may have delivered free samples from the asteroid belt.
India Heads to the Moon With Chandrayaan 2
India enters the 21st-century race to the Moon with its Chandrayaan 2 mission.
The Science of Apollo
Apollo 11 broke new ground for exploration, but along the way NASA squeezed as much science as it could out of this and subsequent missions landing on the Moon. From President John F. Kennedy’s 1961 mandate to the moment when Apollo 17 departed the Moon in 1972, Apollo was about…
Sky-surveying Telescopes Sweep Up Near-Earth Asteroids
Discoveries include a near-Earth asteroid with the shortest “year” and another found hours before it burned up in Earth’s atmosphere.
A Strategy to Get the Mars Insight Lander Back in the Drilling Business
Insight's robotic arm has uncovered the lander's "mole," as NASA and German aerospace engineers work to get it drilling once again.
We’re Going to Titan! Dragonfly Drone Will Explore Saturn’s Biggest Moon
NASA has selected its next New Frontiers mission: Dragonfly, a rover-sized drone will begin ‘coptering around Titan in 2034.
Exploring the Solar System: Mission Updates
Space agencies have selected two solar missions and a “comet interceptor” for development and launch.
Huge Mass Found Under Moon's Largest Basin
Does the massive metallic core of a primordial impactor lie buried under the South Pole-Aitken basin on the lunar farside?
Astronomers Stalk the "Taurid Swarm"
If theorists are right, next month observers should spot a cluster of potentially hazardous asteroids as they cruise past Earth.
Could a Long-Ago Collision Explain Our Two-Faced Moon?
New research shows that a planetoid impact could have made our Moon asymmetric.
Was ‘Oumuamua a Fragment from a Disintegrated Comet?
A new study suggests that ‘Oumuamua’s strange trajectory back out to interstellar space can be explained if the object had the density of air.
Apollo-era Data Reveal Moon’s Tectonic Activity
A new look at old seismic data gathered during the Apollo missions reveals young active faults as a possible origin of shallow moonquakes.
Planetary Society Grants Help Astronomers Track Dangerous Asteroids
There are some 25,000 near-Earth asteroids with diameters more than 140 meters. Amateur astronomers can find them — and the Planetary Society can help.
The Aurora Called STEVE Isn’t Aurora After All . . . Mostly
New observations of STEVE, the mauve celestial ribbon that aurora chasers have seen fluttering in the sky, have helped scientists determine the energy source of this unique phenomenon.
What the First Marsquake Means for NASA's Insight
After two months, InSight’s seismometer has picked up the first rumblings in Martian soil. Turns out marsquakes may be less frequent than thought.
The Martian Methane Mystery Continues
The most advanced instrument ever sent to Mars to study its atmosphere has failed to find any methane after months of searching.
Curiosity Sees Phobos Transit . . . After Sunset
NASA's Curiosity rover just spied transits of both Martian moons across the face of the Sun — including one that happened after the Sun had set.
New Study Confirms Methane on Mars – But It’s Not Definitive
Independent methane detections in the Martian atmosphere by the Curiosity rover and Mars Express orbiter add confusion to a convoluted story.
Saturn's Rings Built Up Its Tiny, Close-in Moons
A new study of observations from NASA's Cassini sheds light on the tiny moons that orbit within Saturn's vast ring system.
Hayabusa 2 Finds Asteroid Ryugu Is Dark & Dry
Hayabusa 2’s asteroid Ryugu has some unexpected characteristics. In particular, its dry surface could spell trouble for current theories about how Earth obtained its water.
