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The quartet of stars that became a triple

Stellar Science

This Triplet of Stars Was Once a Quartet

Stellar mergers in quadruple systems might be common, a new study shows.

Moon passing Regulus and Leo, July 2-4, 2022

Celestial News & Events

This Week's Sky at a Glance, July 1 – 9

The Moon waxes across the evening sky from Leo to Scorpius. The five-planet lineup in the dawn is now four. And amateur astronomers plan to be recording as Saturn's hazy moon Titan occult a star about as bright as Titan itself for most of North America.

Sagittarius-Scorpius on July evenings

Sky Tour Astronomy Podcast

July: Stars of the Summer Sky

July offers lots of pretty stars and constellations to check out, and you’ll get a personally guided tour of them by downloading this month’s Sky Tour astronomy podcast.

HL Tau by ALMA

Citizen Science: Projects & Collaboration

Citizen Scientists Detect Dusty Disks

Disk Detective, a citizen science project dedicated identifying planet-forming disks around young stars, reports their latest results.

Capstone spacecraft in orbit around Moon (art)

Spacecraft and Space Missions

Successful Launch of Capstone, the Lunar Gateway Pathfinder

Capstone, a small pathfinder spacecraft with a big mission, launched today to pave the way for crewed return to the Moon.

Impact Crater

Astronomy in Space with David Dickinson

Found: Booster Impact Crater on the Farside of the Moon

The Lunar Reconnaissance Orbiter mission has found the impact site created March 4th. The crater might help reveal the impactor's identity.

Crescent Moon passing Venus and Mercury, June 26-27, 2022

This Week's Sky At a Glance

This Week's Sky at a Glance, June 24 – July 2

The crescent Moon returns to the evening, crossing Leo. The five-planet lineup continues at dawn; catch it while you still can. And for skywatchers at northern latitudes, we're entering noctilucent cloud season.

A Worthy Challenge in Orion

Milky Way

Supernovae Swept Out Barnard's Loop in Orion

Astronomers have mapped Orion in 3D to understand the origin of the large arc of Barnard’s Loop — and you can interact with the 3D image!

Kitt Peak fire

Astronomy and Society

Wildfire Threatens Kitt Peak National Observatory

The Contreras wildfire has been threatening the historic Kitt Peak National Observatory in southern Arizona.

ISS view of Earth at night

Astronomy and Society

What we know about Light Pollution – and What We Don’t

The International Dark-Sky Association’s has summarized more than 300 peer-reviewed studies on the effects of artificial light at night in an effort to help dark-sky advocates.

Dawn planet line

Explore the Night with Bob King

Solar System Gets its Ducks in a Row

We'll have not one but many opportunities to enjoy a rare lineup of the bright planets over the next few weeks. Amazingly, they'll be aligned in order of their distance from the Sun.

Moon passing Jupiter and Mars in the dawn, June 21-23, 2022

This Week's Sky At a Glance

This Week's Sky at a Glance, June 17 – 25

The five naked-eye planets form a diagonal line in the dawn this week — in order of their distance from the Sun, no less. And the waning Moon visits each one in turn, day by day.

White dwarf surrounded by debris disk (art)

Stellar Science

A Strange White Dwarf with a Chaotic Past

New observations show that both rocky and icy worlds fell onto a white dwarf, indicating past orbital chaos in the system.



Life and Death in Nearby Galaxies

New images of nearby galaxies and their surroundings reveal details in galactic formation and evolution — and puzzles that remain to be solved.

a black dot at the center of a swirl of pink, purple, orange, grey, and other colors

Black Holes

Have We Found the First Rogue Black Hole in the Milky Way?

Hubble observations have revealed a stellar-mass compact object — a black hole or possibly a neutron star — wandering our galaxy.

Gaia visualization of Milky Way

Stellar Science

The Gaia Revolution: New Data and Strange Stars

Astronomers will use the newest data release from the Gaia mission to explore stellar tsunamis, Milky Way history, and more.

An arm to the sun

Spacecraft and Space Missions

Newest Starlink Satellites Have Gotten Brighter Again

Changes to the design of Starlink satellite spacecraft have made them brighter again, though still dimmer than the original design.

Moon crossing Scorpius, June 12-13, 2022

Celestial News & Events

This Week's Sky at a Glance, June 10 – 18

The waxing gibbous Moon shines with Spica, then occults Delta Scorpii. Meanwhile, all seven planets other than Earth are forming into a diagonal line across the east to southeast at dawn.


Astronomy in Space with David Dickinson

Perseverance Watches Wild Winds on Mars

NASA’s Perseverance rover is recording the windy weather in Jezero Crater, chronicling its role in making the Red Planet dusty.

Stellar Science

An Unusual Source Deepens Fast Radio Burst Mysteries

A new source of fast radio bursts raises questions about how much we really know about these mysterious flares.

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