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galaxy without dark matter

Galaxies

A Galaxy Without (Much) Dark Matter

Astronomers have found a peculiar object: a fluffy galaxy that has little to no dark matter.

Jupiter's South Pole

Spacecraft and Space Missions

Amazing Storms, Jet Streams on Jupiter

NASA’s Juno spacecraft has found breathtaking cyclones at Jupiter’s poles and probed how deep the planet’s jet streams go.

Robo-AO

Exoplanets

Extra Stars Might Downsize Exoplanets

Follow-up studies of candidates planetary systems found by NASA’s Kepler mission suggest that companion stars make some worlds appear smaller than they really are.

Astrobiology

Some Plants Grow Well in Martian Soil

Astrobiology students cultivated leafy greens, sweet potatoes, and even hops in simulated Martian dirt.

Stellar Science

Ringed Disks Don’t Always Mean Planets

Astronomers presenting at the winter American Astronomical Society meeting caution that the features often pointed to as evidence of growing natal planets could form on their own.

star on a scale

Stellar Science

60-Second Astronomy News: Dec. 20, 2017

This week's roundup of astro news brings us a polar-orbiting planet, a novel way to measure stellar masses, and ginormous convective bubbles on a distant star.

cosmic time and quasar

The Black Hole Files with Camille Carlisle

Most Distant Black Hole Yet

Astronomers have discovered a supermassive black hole scarfing down gas just 690 million years after the Big Bang.

galactic center, outflows marked

The Black Hole Files with Camille Carlisle

Infant Stars Huddle near Black Hole

A team of astronomers has found signs of small stars forming within a few light-years of the Milky Way’s central black hole.

five black hole mergers

Black Holes

LIGO Sees Smallest Black Hole Binary Yet

LIGO has detected another black hole merger, raising the tally to five.

protostar cloud

The Black Hole Files with Camille Carlisle

First Black Holes Maybe Had Supersonic Help

Gas flows in the early universe may have kept clouds from collapsing too soon, enabling them to grow into massive black hole seeds.

cosmic ray air shower

Cosmology

Some Cosmic Rays Come from Outside the Galaxy

Astronomers have detected more extremely energetic cosmic particles coming from one side of the sky than the other.

water in lunar regolith

Solar System

New Map of Water in Moon Dust

A new analysis maps out water across the lunar surface, revealing how its abundance changes with latitude.

Cosmology

Does Dark Energy Change Over Time?

Scientists are considering whether the mysterious “force” accelerating the universe’s expansion changes with time.

TRAPPIST-1

Exoplanets

New Age Estimate for TRAPPIST-1

A new study suggests that the seven-planet dwarf star could be much older than the Sun.

cutaway of Sun

Stellar Science

Sun's Waves Reveal Core's Spin

Solar astronomers may have finally detected gravity waves in our star’s core, revealing that the Sun’s central region rotates about four times faster than the outer layers.

hot Jupiter WASP-121b

Exoplanets

Exoplanet Might Have Ozone-like Layer

Astronomers have potentially detected a stratosphere in the atmosphere of a hot Jupiter.

Herschel Sprint: NGC 4911

Milky Way

Milky Way May Be Made with Swapped Gas

High-powered simulations suggest that half of the material in the Milky Way could come from other galaxies.

merging black holes

The Black Hole Files with Camille Carlisle

LIGO Detects Third Black Hole Merger

Scientists with the gravitational-wave observatory announce another discovery, this time of a black hole merger twice as far away as previous detections.

trappist-1 orbits

Exoplanets

Seventh TRAPPIST-1 Planet Confirmed

Astronomers have confirmed the existence of the seventh planet around the ultracool dwarf star TRAPPIST-1.

map near 8.3N lat, 47.95E

Astrobiology

How Hard Did It Rain on Ancient Mars?

Mars was once far wetter than it is now — but just how much rain fell, and when?

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