1–20 of 137 results

Milky Way

Rethinking the Milky Way’s “Galactic Fountain”

The Milky Way recycles gas from dying stars to make new ones — but new observations show pristine gas also comes in from outside our galaxy.

Supernova 1987A (no labels)

Stellar Science

Gotcha: Firm Evidence for a Neutron Star in Supernova 1987A

After decades of debate, James Webb Space Telescope observations provide firm evidence of a neutron star inside the 1987A supernova remnant.

Big and Big Arc portrayed as dots on a sky map

Cosmology

Astronomers Find "Big Ring" 1.3 Billion Light-Years Across

Standard cosmological scenarios might not explain the breadth of a newly discovered cosmic structure.

CHARA image of RW Cephei, before and after

Stellar Science

Astronomers Watch Another Giant Star Dim

Turns out, Betelgeuse isn't the only giant star to undergo a "Great Dimming."

artist's impression of weird inflated planet

Exoplanets

Webb Telescope Peers into Puffy Planet with Clouds of Sand

A mere 200 light-years away, there's a planet with the density of styrofoam and clouds of sand. How did it get so weird?

Horsehead Nebula

Space Missions

New Cosmology Probe Presents First, Stunning Images

The Horsehead Nebula and other stunning scenes highlight the talents of the just-launched Euclid mission. The telescope will reach into the depths of the cosmos to understand dark matter and dark energy.

composite showing an ultra-diffuse galaxy in color surrounded by background shown in black and white

Galaxies

Ghost-like Galaxy Defies Dark Matter Model

Astronomers have discovered a large but very dim ghost-like galaxy. Its existence challenges our notions of dark matter.

The cosmic web of dark matter particles is sharp

Cosmology

Largest-ever Computer Simulation of the Universe

The Flamingo simulations are not only the largest but also the most all-encompassing simulations of the universe, from 13.75 billion years ago to today.

Giant blue star is rugby-ball shaped, with a smaller blue companion to lower left

Stellar Science

Surf’s Up: Waves Might Be Breaking on This Star

An unusual star system that brightens and fades every month might have giant plasma waves breaking on its surface.

Hyades star cluster

Black Holes

Does the Hyades Star Cluster Harbor Black Holes?

The nearest black holes might be hiding just around the corner, 150 light-years away in the Hyades star cluster.

Neutron star

Stellar Science

Astronomers Find Mysterious, Slowly Pulsing Star

An unidentified source has been beaming out a pulse of radio waves every 22 minutes since 1988.

Illustration of a supermassive black hole binary system

Black Holes

Gravitational Waves from Supermassive Black Holes Revealed

Radio observatories across the globe have found compelling evidence for the existence of very-low-frequency gravitational waves.

Radio waves from fast radio burst penetrate intergalactic plasma on their way to Earth in the Milky Way

Stellar Science

Mystery Bursts Give Astronomers a View into Galaxy Halos

Flashes of radio waves — whose exact sources are still a bit of a mystery — are helping astronomers learn about the hot gas that surrounds the Milky Way.

Artist's concept of a first-generation star tearing itself apart

Cosmology

The First Stars Weren’t Born Alone

New evidence suggests the first stars to shine in the universe formed in groups.

Green arc floats above the Andromeda Galaxy

Galaxies

Amateur Astronomers Find Glowing Gas Arc Near Andromeda

An arc that glows green thanks to doubly ionized oxygen appears near the Andromeda Galaxy in a photo obtained by amateur astronomers.

Supernova fireworks

Stellar Science

White Dwarf Survived 850-year-old Supernova

A supernova that skywatchers in the Far East observed almost 850 years ago has produced the most unusual remnant astronomers have ever found

Dark dusty disk surrounds companion star, passing in front of a more distant red giant star (art)

Stellar Science

Astronomers Discover Giant Blinking Star

A red giant star thousands of light-years away "blinked," dimming significantly for seven long years, before returning to normal.

Galaxies

Squid Galaxy Gets in on the Neutrino Game

Astronomers have connected dozens of neutrinos detected by the IceCube Observatory to a nearby galaxy, M77, aka the Squid Galaxy.

Palimpsest

History and Sky Lore

Lost Star Catalog of Ancient Times Comes to Light

Technology may have revealed a piece of the long-lost works of Greek astronomer Hipparchus, one of the greatest astronomers of antiquity.

Artist's impression of exploding star

Milky Way

Speeding Cloud Might Come from Recent, Nearby Supernova

Hypervelocity clouds, generally thought to be falling fast into the Milky Way, might have an alternative explanation that places them near us.

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