how sputtering works

Solar System

Mars Lost Atmosphere to Space

NASA’s MAVEN mission has confirmed that the solar wind stripped the Red Planet of its atmosphere.

Rosetta Selfie

Solar System

Rosetta Sees Changing Face of Comet 67P

Data from the Rosetta mission has linked outbursts on Comet 67P/Churyumov-Gerasimenko with dramatic changes on the comet's surface.

Pan

Solar System

Welcome to Pan: Saturn's Ravioli-Shaped Moon

Cassini gave us a good look a Saturn's moon Pan last week... and what a strange world it is.

Bright dome in Occator on Ceres

Solar System

Bright Mound on Ceres Due to Briny Eruptions?

The strange bright deposits inside Occator crater on Ceres are probably from cryovolcanic eruptions that are much younger than the crater itself.

Fireball over ALMA

Solar System

A New Take on the Audible Meteor Mystery

A recent study suggests a plausible mechanism to explain why observers sometimes hear superbright meteors at the same time that they see them.

Solar System

Find New Worlds, Film an Eclipse & Do Some Citizen Science!

Hankering to discover new solar systems or understand our own? These citizen science projects and public data troves will help you fill your free time.

Jupiter's south pole

Solar System

Juno Will Stay in Current Orbit Around Jupiter

NASA has announced that its Juno spacecraft will remain in a wide-ranging orbit around Jupiter, extending the mission's lifetime.

organic material on Ceres

Solar System

Scientists Find Organics on Ceres

The Dawn spacecraft has detected organic compounds on the dwarf planet Ceres.

NE Syrtis Major

Solar System

NASA Narrows Down Mars 2020 Rover Landing Sites

Three possible landing sites are now in the running for the U.S. space agency's next Mars rover.

Solar System

Scientists Recreate Space Weather of 400 Years Ago

Scientists are studying 400-year-old data to predict space weather in the coming decades — and it seems that future may hold fewer Northern Lights.

Solar Nebula

Solar System

Meteorites Date Demise of Solar Nebula

A study of ancient meteorites has refined the date for the dissolution of the solar nebula, the cloud that shrouded our Sun in its earliest days.

Juno at Jupiter

Solar System

Juno Swoops Past Jupiter's South Pole

NASA's Juno spacecraft continues to give us amazing views of Jupiter, now from its fourth perijove pass.

Rooftop micrometeoroids

Solar System

Micrometeorites Found on City Rooftops

A recent study found micrometeorites in piles of dirt collected from urban European rooftops.

Daphnis

Solar System

Cassini Spies Daphnis Making Waves

NASA's Cassini returns stunning new views of Daphnis and friends from its ring-grazing orbits.

Akatsuki at Venus

Solar System

Akatsuki Spies Massive Wave on Venus

Japan's Venus orbiter has witnessed a huge atmospheric wave that spans the globe.

Formation of the Moon

Solar System

When and How Did the Moon Form?

New studies offer contrasting scenarios for making the Moon. One argues for a one big splat early in solar-system history; a second envisions a score of lesser blows that built up the Moon over time; and a third suggests water was involved.

Solar System

The Spotless Sun

The Sun has been unusually quiet lately. Since the start of 2017, only a single tiny sunspot has made a brief appearance on the solar disk.

Voyagers and ISM

Solar System

Voyagers Flying Through Galactic Clouds

Astronomers have combined data from the Voyager spacecraft and the Hubble Space Telescope to probe the stuff between the stars.

Pluto's Sputnik Planum in color

Solar System

Top 12 Astronomy News Stories of 2016

From the discovery of gravitational waves to the building evidence that a massive planet could exist beyond Pluto, it has been a thrilling year for astronomy research. We recap.

Sky & Telescope's Pluto globe

Solar System

Sky & Telescope's Pluto Globe is Here!

This beautifully detailed 6-inch globe lets you explore the amazing geology revealed by New Horizons during its historic 2015 flyby.