SUNSET: 
A Possible Solution to Mars’s Methane Problem
A small amount of seepage could explain conflicting measurements of methane in the Martian atmosphere.
Image Sleuth Spots "Churyumoon" Around Rosetta's Comet
A tiny, 4-meter fragment dubbed Churyumoon has been spotted orbiting Comet 67P Churyumov-Gerasimenko, which the Rosetta mission visited in 2014–2016.
Beta Pic's New Planet, Jupiter’s Fuzzy Core & An Ancient Star
Astronomers announce another planet around Beta Pictoris, simulations explain Jupiter's large and fuzzy core, and observations reveal an ancient star.
NASA Selects Final Four Asteroid Landing Sites for Osiris-REX
The Osiris-REX spacecraft will sample one of four sites on the asteroid Bennu in July 2020.
New Images from China's Chang'e 4 as Eighth Lunar Day Ends
China’s Chang’e 4 mission is continuing its science and exploration work on the farside of the Moon, having completed its eighth lunar day of activities on Wednesday.
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.
