81–100 of 355 results
artist's concept of Cassini at Enceladus

Solar System

Enceladus: Hydrothermal Heating Confirmed

Astronomers have more evidence that the hidden ocean inside Saturn’s moon Enceladus is heated by hydrothermal activity.

illustration of Ceres

Solar System

Sun Triggers Ceres’ Fleeting Atmosphere

Planetary scientists think the Sun may inadvertently create a transitory, tenuous atmosphere around the dwarf planet Ceres — and in an unexpected way.

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.

stars forming in galactic outflow


Stars Born in Galactic Wind

Astronomers have found newborn stars in gas pouring out of a galactic nucleus.

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


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.

Phoenix galaxy's bubbles and filaments


Active Black Hole Encourages Starbirth

Astronomers have discovered long filaments of cold gas — the ingredient for making stars — cocooning giant bubbles inflated by a black hole.

organic material on Ceres


Scientists Find Organics on Ceres

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

local cosmic structure


Cosmic Void “Pushes” Milky Way

Astronomers have discovered a giant cosmic void that explains why our Local Group of galaxies is moving through the universe as fast as it is.

flaring M dwarf

Stellar Science

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.

Cygnus A in infrared


Mystery Object in Cygnus A Galaxy

Astronomers have discovered an object in the active galaxy Cygnus A that wasn’t there before.

Voyagers and ISM

Spacecraft and Space Missions

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.

contact binary star

Stellar Science

Paired Stars in Cygnus En Route to Merger

Astronomers suspect that a binary star system in Cygnus is preparing to make one star of two, erupting in a red nova visible to the naked eye.

black hole illustration

The Black Hole Files with Camille Carlisle

What’s Inside a Black Hole?

What’s inside a black hole? Wormholes? Alternate universes? If you fell into a black hole, only one thing’s for sure: its tidal forces would kill you.


Science-based Q&A

Black Hole Facts

Learn what a black hole is, what we mean by “singularity” and “ergosphere,” and why we think black holes are real.

Curiosity on Mars cartoon

Solar System

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.

illo of a near-Earth asteroid

Solar System

A Basketball-Player-Sized Asteroid

Planetary scientists have pinpointed the size of a near-Earth asteroid to be a mere 2 meters, one of the smallest ever characterized.

FRB spectrum


Radio Bursts Herald Future Science

For the first time, astronomers have discovered a (potential) high-energy counterpart to a fast radio burst, and also used a different burst to probe the cosmic web.

Mars in UV

Solar System

MAVEN’s Mars: in Ultraviolet

NASA’s youngest Mars orbiter has watched clouds grow and detected an ozone accumulation on the Red Planet.

crater appears on Moon

Solar System

Space Rocks Hit the Moon Often

Observations from NASA’s Lunar Reconnaissance Orbiter reveal that the Moon is being pockmarked by meteoroids at a higher rate that previously predicted.