1–20 of 357 results
Two neutron stars prior to merger

Stellar Science

Gravitational Waves Put Ruler to Neutron Stars

Scientists have combined observations of gravitational waves from a neutron star collision with nuclear theory to shed light on the size and nature of neutron stars.

Then and now

Celestial News & Events

The Fall and Rise of Betelgeuse

With its recent uptick in brightness, Betelgeuse appears to be slowly returning to normal. But will it? Astronomers urge us to keep watch.

Betelgeuse telescopic view

Explore the Night with Bob King

Is Betelgeuse Approaching a Crossroads?

Astronomers all over are waiting with bated breath to see what Betelgeuse will do next. Is it going to start brightening again on February 21st? Or will it continue to surprise?

Stellar Science

Faint Repetitions of an Extragalactic Burst

New evidence deepens the mystery of fast radio bursts (FRBs), the brief flashes of radio emission stemming from unknown sources beyond our galaxy.

Stellar Science

Flapping "Bat Wing" Could Reveal Secrets of Planet Formation

The shadow cast by a protoplanetary disk takes the shape of a bat — and over time, flaps like one, too. The eery shadow could help astronomers understand the planet-forming material inside the disk.

Pulsar-white dwarf pair

Cosmology

White Dwarf’s Whirlwind Spin Drags Spacetime

Astronomers have used observations of a tight white dwarf-neutron star pair to confirm an aspect of Einstein's general theory of relativity.

Superluminous supernova SN 2006gy

Stellar Science

Superluminous Supernova, Explained?

Some brilliant explosions at least 10 times more powerful than regular supernovae might come from a white dwarf merging with a massive companion star. But not everyone agrees on that explanation.

Thuban in TESS image

Celestial News & Events

See Ancient “North Stars" Eclipse Each Other

The ancient pole star known as Thuban turns out to be an eclipsing binary. If you're up for a challenge, you can see the eclipses for yourself.

Host Galaxy of a Radio Flash

Stellar Science

New Mysterious Radio Flash Pinned Down; Hundreds More Being Discovered

Recent observations have pinpointed the location of a fifth fast radio burst, shedding light on the environs that create these powerful sources.

Stellar Science

Baby Stars Found in Ancient Part of Our Galaxy

Ground- and space-based observations have revealed a group of stars at the head of the giant stream of gas burrowing its way through the Milky Way.

V Sagittae Finder Chart

Stellar Science

Mark Your Calendar: Stellar Fireworks Predicted for 2083

According to Bradley Schaefer (Louisiana State University), the 11th-magnitude variable star, V Sagittae, will outshine Sirius and maybe even Venus — despite its distance of some 7,500 light-years.

Neutron Star Pair Collides (art)

Stellar Science

Gravitational Waves from Second Neutron-star Collision Observed

Scientists with the Laser Interferometer Gravitational-wave Observatory (LIGO) and Virgo collaborations have announced the detection of a second pair of neutron stars that went bump in the night.

Star orbiting black hole

Black Holes

Heavyweight Black Hole Find Mystifies Astronomers

Observations of a star have found it orbiting an unexpectedly massive black hole. If the discovery pans out, it would change our understanding of how massive stars die.

Gamma-ray burst illustration

Stellar Science

Astronomers See Extreme Photons from Collapsing Massive Stars

Astronomers have detected a long-sought signal from gamma-ray bursts — the highest-energy photons ever seen from these events.

Boyajian's Star (art)

Stellar Science

Are There More Stars Like Boyajian’s Star?

Remember KIC 8462852, better known as Boyajian’s star (or you may have seen it referred to as the “alien megastructure” star)? We still don’t have a definitive explanation for this source’s odd behavior — in part because we thought that Boyajian’s star was one-of-a-kind.

Supernova (artist's concept)

Stellar Science

The Supernova That Destroyed Its Star

Astronomers have discovered a real and unprecedented example of a type of supernova that was until now largely theoretical — a stellar explosion that leaves nothing behind.

U Cam mass loss

Stellar Science

Century of Amateur Observations Shed Light on Star's Evolution

The amateurs of the AAVSO monitored the star T Ursae Minoris for a century. Now, astronomers think they can explain the star's recent change in behavior.

Pisces–Eridanus stellar stream

Stellar Science

A Nearby Stellar Stream Gets Carded

The stellar stream Pisces–Eridanus may try to pass itself off as a billion years old, but scientists are calling its bluff.

Artist's concept of Beta Pictoris system

Exoplanets

Beta Pic's New Planet, Jupiter’s Fuzzy Core & An Ancient Star

Astronomers announce another planet around Beta Pictoris, simulations explain Jupiter's large and fuzzy core, and observations reveal an ancient star.

Lensing white dwarf

Stellar Science

An “Impossible” White Dwarf Identified in Kepler Data

Meet the white dwarf that defies all expectations.

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