SUNSET: 
Titan’s Flooded Canyons
Cassini radar observations reveal a channel system on Saturn’s biggest moon, Titan, that is drowned in liquid methane.
Missing Craters on Ceres
The dwarf planet has a paucity of big pockmarks because it has somehow erased them.
Dark Streaks on Mars Revisited
New research on seasonal streaks in Martian canyons provides evidence against underground pools of water.
Kuiper Belt's Big, New, Far-Out Object
First spied last year, an object designated 2015 RR245 turns out to be one of the largest and most distant objects yet found orbiting the Sun.
NASA's Juno Probe Reaches Jupiter
After a 5-year-long journey, NASA's latest emissary to the largest planet in the solar system has arrived at its destination.
Ceres Bright Spot is Salty
Spectral observations by NASA’s Dawn spacecraft reveal that the dwarf planet’s mysterious beacon is made of salt.
Newfound Object 2016 HO3 Shares Earth's Orbit
A recently discovered asteroid plays leapfrog with Earth as they both orbit around the Sun.
Seeing Sunspots as Early Astronomers Did
Astronomers have reconstructed 18-century telescopes to observe sunspots and better understand solar cycles.
FRIPON: A New All-Sky Meteor Network
An innovative new meteor detection network will engage researchers and the public in a search for space rocks.
Comets Break Up and Make Up
Comet 67P/Churyumov-Gerasimenko appears to have split into two segments that briefly orbited each other and then slowly merged into a new configuration.
VLA Probes Deeply into Jupiter’s Atmosphere
Astronomers have new radio images of Jupiter that allow them to see deep into its atmosphere.
Amateur Astro-imagers Get Ready for Juno
Planetary scientists are counting on amateur observations to enhance the results from NASA's forthcoming Juno mission.
Dwarf Planet 2007 OR10: Big, Dark, and Slow
A Kuiper Belt object discovered nearly a decade ago turns out to be much darker — and thus larger — than thought. It's also an especially slow spinner.
Curiosity Sees Seasonal Trends on Mars
During two Martian years, Curiosity tracks seasonal patterns in atmosphere, temperature, and maybe even methane.
S&T Live Webcast: Transit of Mercury
Join in Monday, May 9th, as tiny Mercury crosses the Sun's disk for the first time since 2006. S&T's exclusive video feeds and expert interviews will air throughout the 7½-hour event.
A Moon for Kuiper Belt's Makemake
Astronomers have been searching for companions to the distant dwarf planet Makemake for years. Finally, they've spotted one.
Saturn Moons Could Be Young
Planetary scientists have increasing reasons to think that some of the ringed giant’s moons are only 100 million years old.
Pluto's Atmosphere Confounds Researchers
Observations by NASA's New Horizons spacecraft, combined with new modeling of long-term trends, suggest that Pluto's atmosphere is far more dynamic than anyone imagined.
Mars Gravity Map
By tracking deviations in spacecraft orbits, planetary scientists have created a high-resolution map of the Red Planet's gravitational pull.
The Mystery of Pluto's Floating Hills
Among its other geologic oddities, Pluto has clusters of hills floating in a frozen "sea" dominated by nitrogen ice. These bobbing bumps might hold clues to the plain's depth and evolution.
