1–20 of 79 results
artist's illustration of sun with glint

Solar System

Caught in a Solar Storm on the Way to Mars

A chance alignment between Earth and a Mars-bound spacecraft has given us a rare glimpse at the motions of high-energy particles from the Sun.

four overlapping jupiters showing dark orange marks on the bottom

Exoplanets

When Planets Collect Comets

What kind of planets are likely to ensnare comets coming in from the icy outer reaches of a planetary system?

Centaurus A galaxy

Stellar Science

The Life and Times of Immortal Stars

Under the right conditions, stars could become immortal. How is this possible, and what does it mean for these stars’ surroundings?

Solar Orbiter images of Sun

Solar System

Spotting Dots on the Sun

You’ve heard of sunspots, but how about Sun dots? A recent solar mission has snapped photos of tiny, bright dots on the Sun, and astronomers are contemplating their cause.

FRB counterpart

Stellar Science

A Possible Optical Counterpart to a Fast Radio Burst?

What’s the mechanism behind millisecond-duration bursts of radio energy coming from outer space? A team searched for visible-light counterparts to constrain the origin of fast radio bursts — and found one.

a white planet with orange and green strip against a black background

Exoplanets

First Look at an Unusual Exoplanet’s Atmosphere

AAS Nova reports on a "super-puff" exoplanet that's nearly 15 times less dense than Jupiter.

Stellar Science

Protostar Companions in Orion

How are stars born? One of the best places to test ideas about stellar birth is in Orion.

Artist's illustration of a magnetar

Stellar Science

Exploring a Magnetospheric Origin for Fast Radio Bursts

Astronomers are starting to close in on the origins of fast radio bursts — powerful, fleeting flashes of radio waves seen at extragalactic distances.

Venusian volcano Idunn Mons in radar data

Solar System

The Case for an Active Volcano on Venus

After decades of studying Venus, many questions remain about our planetary next-door neighbor. One question has particularly intrigued astronomers: which, if any, of Venus’s 1,600 volcanoes are still active?

An image of the globular cluster Messier 5

Stellar Science

Unlocking the History of Globular Cluster Messier 5

A new study uses precise measurements of chemical elements to explore the formation history of one of the oldest globular clusters in the Milky Way.

The merger of a black-hole binary

Black Holes

Addressing a Gap in Our Knowledge of Black Holes

Gravitational waves offer a test of whether supernovae can produce black holes between 55 and 120 times the Sun's mass.

Illustration of WASP-79b

Exoplanets

A Pileup of Perpendicular Planets

In some planetary systems, the direction that a star spins and the direction its planets orbit don’t always line up. A new study explores what we can learn from these nonconformists.

A black-hole binary

Black Holes

Jumping the Gap to Probe Large Black Holes

Gravitational-wave detectors should be able to locate a population of huge black holes soon. A new study predicts when we'll find them, and what they'll teach us.

An artist’s impression of the collision of two black holes

Black Holes

Redefining a Heavy Collision

Could the biggest — literally — gravitational-wave discovery yet be something other than what it initially seemed?

An artist's impression of a gas cloud as it passes the black hole at the center of the Milky Way.

Black Holes

Flares from the Milky Way’s Supermassive Black Hole

The supermassive black hole at the center of the Milky Way released an unusual number of strong flares in 2019. Now, astronomers are trying to figure out why.

Photo of an edge-on galaxy encircled by a faint stream of stars.

Milky Way

Seeking the Origins of Galactic Stellar Streams

A recent study has identified the origins of many of the long streams of stars that encircle the Milky Way. These streams may contain hints about our galaxy's past.

An Artist's impression of WASP-107b

Exoplanets

Spotting a Faint Escaping Atmosphere

Low-density exoplanets orbiting close to their host stars tend to lose their atmosphere. Now, astronomers can measure how fast it disappears.

An explosive outflow of molecular gas within the Orion Nebula

Stellar Science

A Map of a Stellar Explosion

Scientists may have discovered a clue to how massive stars form in the Orion Nebula and a stellar birthplace.

Artist’s impression of the Ulysses spacecraft

Solar System

Measuring Solar Eruptions with a Rare Alignment

New analysis of a coronal mass ejection detected by the alignment of two spacecraft reveals that it experienced erosion and restructuring as it traveled.

Artist’s impression of a binary neutron star and the gravitational waves the system emits.

Professional Telescopes

How to Warn of Imminent Neutron Star Collisions

What if gravitational-wave observatories could send out alerts right after — or even before — receiving signals of neutron star collisions?

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