21–40 of 58 results
Exomoon (art)

Exoplanets

Exomoon or No Exomoon?

Last October, the first discovery of a potential exomoon was announced. But is Kepler-1625b-i an actual moon in another solar system? Or just an artifact of data reduction?

Superluminous supernova (artist's impression)

Stellar Science

A Link Between Fast Radio Bursts, Magnetars, and Supernovae?

What causes the bizarre, extragalactic fast radio bursts we’ve detected over the last decade? An unusually bright supernova may hold the answer.

Buckyball

60 carbon

Hubble Confirms Interstellar Buckyballs

From a jumble of confusing clues in Hubble observations of interstellar space, scientists have picked out evidence of a celebrity molecule: ionized Buckminsterfullerene, or buckyballs.

Super-puff exoplanet

Exoplanets

Inflating a Super-Puff Planet

Super-puffy exoplanets are a problem. They shouldn’t exist — and yet we've detected half a dozen of them. Here's what theory might be getting wrong.

1758

Dwarf Galaxy or Giant Globular Cluster?

AAS Nova brings us the story of a newly discovered cluster of stars. But the jury's out as to whether this group is a typical ancient stellar cluster or something more.

Molecules in space

aas nova

Taking Note of Molecules in Space

What do methylidyne, cyanamide, vinyl alcohol, and rugbyballene all have in common? They’re all molecules that have been detected in space — and they’re all included in a recent census of our universe’s chemical makeup.

Exoplanets

Exploring the Escaping Atmosphere of HAT-P-11b

The atmospheres of planets close to their host stars live a tenuous existence. New observations from the Hubble Space Telescope show signs of a Neptune-like exoplanet’s atmosphere being eroded away.

Astrobiology

Searching for Alien Needles in the Cosmic Haystack

Humanity’s search for signs of extraterrestrial intelligence has been underway, in one form or another, for decades. But how much searching have we really done?

Black Holes

A Black Hole X-Ray Binary Rises

New observations have captured a feeding black hole in our galaxy as it bursts onto the scene.

Stellar Science

Speeding White Dwarfs May Point to Past Explosions

A recent study has discovered three of the fastest stars — white dwarfs — known in the Milky Way. But these stars may be more than just speeders — they might also be evidence of how Type Ia supernovae occur.

Stellar Science

Two Explosions with Similar Quirks

High-energy radiation released during the merger of two neutron stars last year has left astronomers puzzled. Could a burst of gamma rays from 2015 help us to piece together a coherent picture of both explosions?

Galaxies

How to Turn Off a Galaxy’s Star Formation

New observations by the Atacama Large Millimeter/submillimeter Array (ALMA) provide a close look at a galaxy that may be in the process of shutting down its star formation.

Stellar Science

A New Look at the Solar Corona

The hot, tenuous solar corona is visible during a total solar eclipse, and astronomers have long studied the structure and dynamics of the ghostly coronal streamers. Now, a special observing campaign has allowed us to see the corona in unprecedented detail.

Stellar Science

Surprise Discovery of a 14-Year-Old Supernova

Much of today’s astronomy happens via methodical searches, but sometimes serendipitous discoveries still surprise us. Such is the case with the transient CGS2004A, a possible supernova recently detected in a galaxy nearly 50 million light-years away.

Exoplanets

Planet Formation Caught in the Act

A team of scientists has captured evidence that PDS 70b, the first directly imaged instance of early planet formation, is actively accreting material, and they’ve measured the rate at which it’s growing.

Black Holes

A Rapidly Spinning Black Hole with a Warped Disk

An X-ray telescope recently installed on the International Space Station has provided a detailed look at a black hole feeding off its companion star.

Exoplanets

When Giant Planets Orbit Evolved Stars

A new study explores the impacts of stars that age past the main sequence and evolve into red giants on the planets orbiting around them by looking at the orbits of gas giants closely circling evolved stars.

Astrobiology

Identifying Life from Varying Atmospheres

There’s no hiding — changes in Earth’s atmosphere over the seasons are a dead giveaway to the fact that Earth hosts life. Now a new study explores whether we might use atmospheric seasonality like Earth’s to detect life on other planets. Looking for Change Most of the searches for life…

Stellar Science

The Aftermath of GW170817: Neutron Star or Black Hole?

A team of scientists says we now have an answer to one of the biggest mysteries of GW170817: after the neutron stars collided, what object was formed?

Stellar Science

A Massive Neutron Star with a Two-Faced Companion

How massive can a neutron star get? In a recent study, scientists may have identified the most massive neutron star yet — by leveraging observations of its highly irradiated companion.

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