21–40 of 68 results
how sputtering works

Space Missions

Mars Lost Atmosphere to Space

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

artist's concept of TRAPPIST-1 system

Stellar Science

Seven-Planet Star Hides Age, Might Be Deadly

The star with seven exoplanets puts out enough high-energy radiation to tear away the inner planets’ atmospheres in a few billion years.

illustration of TRAPPIST-1 planet sky

Exoplanets

Seven Earth-Sized Planets Found Orbiting Dim Star

Astronomers have found seven Earth-sized planets around a cool red dwarf, all of which have the potential for liquid surface water.

organic material on Ceres

Solar System

Scientists Find Organics on Ceres

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

flaring M dwarf

Exoplanets

Proxima Centauri b Likely a Desert World

Astronomers suspect the Sun’s closest stellar neighbor desiccated its potentially rocky exoplanet, destroying the planet’s chances for habitability.

Pluto's Sputnik Planum in color

Cosmology

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.

Curiosity on Mars cartoon

Astrobiology

Curiosity Tracks Mars’s Ancient Habitability

Curiosity scientists have tracked Gale Crater’s changing environment as it became more, then less, acidic over millions of years. Microbial life could have survived in these conditions.

convective M dwarf

Exoplanets

Proxima Centauri Has Sun-Like Cycle

Observations confirm that the closest star to our solar system has a regular magnetic cycle similar to our Sun.

Propylene Oxide, chiral molecule

Astrobiology

First Chiral Molecule Discovered in Space

The discovery of a chiral molecule in space has the potential to sort out one of the biggest mysteries in the chemistry of life.

Mars's atmospheric loss

Astrobiology

Mars Losing Gas to Solar Wind

NASA’s Mars orbiter MAVEN has painted a detailed picture of how the solar wind robs the Red Planet of its atmosphere.

Enceladus on 28 October 2015

Solar System

Cassini Flies Through Enceladus's Plume

On October 28th, the Cassini spacecraft took its deepest dive through the water plume spewing from the south pole of Saturn’s moon Enceladus. It passed only 30 miles (50 kilometers) above the icy surface.

Asteroid breakup (artwork)

Stellar Science

The Curious Case of KIC 8462852

The Kepler spacecraft recorded a bunch of irregular dimmings around one of its target stars, designated KIC 8462852. No natural phenomenon explains the dips well.

Hale Crater's dark streaks

Astrobiology

Waterlogged Salts on Mars

Scientists have confirmed that water-soaked salts likely create dark seasonal lines on Mars.

Yuri Milner's SETI announcement

Astrobiology

"Breakthrough Listen": Giant Leap for SETI

A $100 million donation will radically speed up the search for artificial signals from the nearest million stars — and from trillions of much farther stars in the 100 nearest galaxies.

glass on Mars

Solar System

The Glint of Martian Glass

Scientists have detected glass in Martian craters, created by the fierce heat of impacts that melted the Red Planet’s surface.

Galaxies

Fooling with the Universe

This year’s April Fools' provides a wealth of alarming results. Catch up on all the scientific shenanigans here.

Astrobiology

A Chaotic Planet-Forming Disk

A new map of Beta Pictoris reveals an asymmetric clump of carbon monoxide likely produced in cometary collisions. It provides a rare glimpse at the chaotic birth of a planetary system.

Astrobiology

Supervolcanoes on Mars

A new analysis of data from spacecraft orbiting the Red Planet suggests that gigantic calderas lie disguised on the planet’s surface. If the features are volcanoes, they could help explain the mysterious, fine-grain debris that coats Mars.

Astrobiology

A Fix for the "Faint Young Sun"

For 40 years astrobiologists have wrestled with how to make the early Earth warm enough to support life even though the young Sun was at least 30% fainter than it is now. New climate models, powered by supercomputers, are converging on a solution.

Solar System

Habitable Oasis on Mars?

The results from the Curiosity rover's first rock-drilling are in: the rock formed in the presence of fairly neutral, not-too-salty water and has a chemical makeup that might have provided energy for microorganisms.