381–400 of 405 results

Stellar Science

NASA Satellite Spots New Type of Pulsar

The Fermi Gamma-ray Space Telescope has made its first major discovery.

Solar System

The Sun Goes Round and (Less) Round

Incredibly precise measurements of the solar surface show that our star isn't quite as spherical as once thought.

Stellar Science

Is This an Alien Planet?

Last April a trio of astronomers spotted something dim, warm, and perplexing next to a not-too-distant star in northern Scorpius.

Stellar Science

Eta Carinae: A Supermassive Showoff

An enormous and famously erratic star in the southern sky might have demonstrated a new kind of stellar explosion during its dazzling eruption in the 1840s.

Stellar Science

Double-Barrel Blast

A gamma-ray burst detected on March 19th was so bright it could be seen with the naked eye. And now astronomers think they know why.

Milky Way

Eta Carinae Prepares for X-ray Crash

Known for its mysteriousness, one of the galaxy's most massive stars gears up for its periodic pundit-perplexing event. Will Eta Carinae finally reveal its secrets?

circuit board

Stellar Science

Artificial Intelligence Aids Astronomers

Astronomers have designed a neural network that can determine the particulars of binary star systems by just examining their light curves — and it can do it really, really fast.

Stellar Science

Faint Supernovae Remain Unexplained

A subclass of supernovae that fades much faster than expected reveals possible kinks in astronomers' theories of what causes these explosions.

brown dwarf binary

Stellar Science

Brown-Dwarf Binary Tests Theories

Recent calculations for a pair of failed stars add to astronomers' scant knowledge of brown dwarfs and will help set a reference point for future studies.

Stellar Science

Regulus’s Secret Companion

Astronomers confirm a low-mass star orbits the Lion’s heart, the bright blue star imaged here to the lower right. But what exactly is it?

Stellar Science

The Most Massive Star Yet?

Searching the core of one of the densest young star clusters in the Milky Way, scientists may have beat out primetime TV in the search for the newest big star.

Milky Way

Predicting a Stellar Catastrophe

Observations made by professional and amateur astronomers during the upcoming, once-in-a-generation eclipse of Epsilon Aurigae may reveal whether or not the star is heading for extinction.

Stellar Science

Supernova Caught at its Very Start

By an unbelievable stroke of luck, X-ray astronomers catch the first minutes of a supernova explosion. You wouldn't have wanted to be there.

Stellar Science

Puny Star's Big Flare Wows Astronomers

While a NASA satellite looked on, last month a red dwarf in Lacerta erupted with a titanic — and unexpected — burst of energy.

Stellar Science

How Type-Ia Supernovae Work: The Movie

You thought an exploding star would be simple? Hah.

Stellar Science

Polaris's Pulsations Pick Up

The North Star, slightly variable in brightness, continues to confound expectations.

Infrared view into Pisces

Stellar Science

The First Type-Y Star?

It's the coolest brown dwarf yet, and it seems to be in a spectral class of its own.

Stellar Science

Standard-Candle Supernova Confusion

Type 1a supernovas are crucial for measuring how the expansion of the universe has been changing. But no one knows for sure exactly what they are.

Stellar Science

A Magnetar in Sheep's Clothing

A run-of-the-mill pulsar throws off its cloak of normalcy and displays its extraordinary nature.

RS Puppis and surrounding nebula

Milky Way

An Ingenious, Super-Good Cepheid Distance

Using a star's pulsations, their reflections, and some simple geometry, European astronomers have set a new record for the best-known distance to a crucial kind of star.

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