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Image of solar plasma in pink

Solar System

Sharpest Images Yet of the Sun's Corona [VIDEOS]

New adaptive optics technology has resulted in the sharpest views yet of the solar corona.

Milky Way snow globe

Milky Way

The Milky Way Returns to the Night Sky in a Tide of Starlight

The summertime Milky Way ascends in the east on May nights. Find a dark sky and let it take you away!

Orbit diagram for 2017 OF201

Solar System

Another Dwarf Planet in Our Solar System?

A newly discovered object in the outer solar system, 2017 OF201, is the largest found in more than a decade.

Jupiter with thin crescent Moon low in bright twilight, May 27-28, 2025

Celestial News & Events

This Week's Sky at a Glance, May 23 – June 1

Have you ever found a hairline crescent Moon as young as 24 hours from new? You get a chance Tuesday after sunset. Mars fades, Jupiter says goodbye, and a globular cluster waits for you in the Keystone.

Galaxy image

Galaxies

Barred Spiral Galaxy Discovered in the Early Universe

The discovery of a barred spiral galaxy in a universe just a couple billion years old suggests that galaxies formed and evolved much more quickly than current theories suggest.

HL Tau by ALMA

Milky Way

Planets Might Abound at the Center of Our Galaxy

The extreme environment at the heart of our galaxy ought to make forming stars and planets difficult, but new estimates show stars (and their planets) have no problems forming there.

M40 up close

Galaxies

The Twisted Path to Unconfounding "Double Star" Messier 40

The story of Messier object No. 40 not only makes for a great yarn, but it also demonstrates the haphazard nature of scientific progress.

Two sets of images show clouds moving higher in altitude over a few days.

Solar System

Methane Clouds in Motion on Saturn's Moon Titan

Astronomers have watched clouds move in Titan's atmosphere and even observed the chemistry of Saturn's moon in action.

snaky filament with zoomed-in photo of a compact source near the filament shown in inset

Milky Way

A Pulsar Broke a Magnetic Thread in the Milky Way

Mysterious threads dangle in the Milky Way center, and a pulsar has punched through one of them — providing fresh perspective on the threads' origins.

Boötes constellation

Night Sky Sights

Meet Boötes, The Herdsman

Spring in the Northern Hemisphere is a prime time to go searching for Boötes, a constellation often referred to as “The Herdsman.”

Waning Moon passing Saturn, then Venus, in the dawn, May 22-23, 2025

Celestial News & Events

This Week's Sky at a Glance, May 16 – 25

Jupiter waves goodbye for the season. Mars forsakes Pollux and Castor and heads for Regulus. Saturn and Venus each pair up with the waning crescent Moon at dawn.

Titan and its shadow Feb. 24, 2009

Celestial News & Events

Titan Shadow Transit Season Underway

Titan shadow transits are rare, occurring only about every 15 years. Don't miss the chance to see one this observing season.

Artist's illustration of a magnetar

Stellar Science

Wandering Magnetar Has Mysterious Origins

Astronomers who tracked a roaming magnetar for over a decade found that it didn’t originate from a supernova, making its origins an open question.

gigantic white jungle-gym-like structure, framed by the opening in the dome

Professional Telescopes

The Extremely Large Telescope: Our Biggest Eye on the Sky

Sky & Telescope's Govert Schilling visits what will be the world's most powerful optical telescope — the Extremely Large Telescope in Chile.

Moon passing Spica at nightfall, May 9-10, 2025

Celestial News & Events

This Week's Sky at a Glance, May 9 – 18

Every month, the Moon takes four days to cross the sky from Spica to Antares. This week it goes unusually close to each of them.

Depiction of blue giant planet in orbit around yellow star

Exoplanets

JWST Sees a Unique Mini-Neptune — the First to Match Predictions

The sub-Neptune TOI-421b is made of much the same stuff as its star — matching predictions, but bucking the trend among other similarly sized planets.

The Milky Way rising over a red-lit field of telescopes and tents

People, Places, and Events

A First-timer’s Trip to the Big Ol’ Texas Star Party

I came for the stars, but I’ll be returning for the people

Full Moon with Cassini's Bright Spot

Celestial News & Events

"Cassini's Bright Spot" Beams at Full Moon

Rayed craters pepper the Moon especially around full. Cassini's Bright Spot is one of the most striking.

Black and white representation of an ellipsoid asteroid

Solar System

Metal Shards Shed Light on the Origin of Asteroid Kalliope

Small relatives of the much-larger Kalliope, a metallic main-belt asteroid shed light on their mutual origin early in solar system history.

Magnetar getting ready to launch an FRB

Stellar Science

Priceless Flares: Magnetars Can Make Gold and Platinum

An almost forgotten observation made 20 years ago provides evidence that magnetars create some of the heaviest nuclei in the universe.