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Stellar-mass black hole with accretion disk and jet

Black Holes

Astronomers Watch Black Hole Jet Launch

Astronomers have watched a jet launch from a stellar-mass black hole inside the Milky Way.

Moon crossing Leo at dawn, Nov. 26-28, 2021

Celestial News & Events

This Week's Sky at a Glance, November 25 – December 4

While the Jupiter-Saturn-Venus line keeps shrinking, all kinds of deep-sky sights, naked-eye to telescopic, show themselves on these moonless evenings.

NASA's DART mission

Solar System

NASA’s DART Mission Launches for Head-on Collision with an Asteroid

The first-ever planetary defense mission is now on its way to the asteroid Didymos and its moon, Dimorphos.

Galaxies in Cetus

Celestial Objects to Observe

Deep-sky Fishing in Cetus, the Whale

Small telescopes can reel in some big ones in the constellation Cetus, the Whale.

Earth Flyby

Astronomy in Space with David Dickinson

Solar Orbiter to Fly Past Earth Thanksgiving Weekend

The Solar Orbiter mission will fly past Earth Friday night, setting up a dramatic sunward plunge.

Portrayal of 'Oumuamua (1I/2017 U1)

Solar System

Can This Near-Earth Asteroid Help Us Understand the First Interstellar Visitor?

Astronomers have observed an object like ‘Oumuamua — but unlike the first known interstellar visitor, this one is in the solar system.

Moon and Aldebaran, Nov. 19, 2021

This Week's Sky At a Glance

This Week's Sky at a Glance, November 19 – 27

Orion now rises in the east around 8 p.m. Will Betelgeuse or Rigel be the first of his bright stars to come up? That depends on your latitude; Los Angeles and Atlanta are balance points. The Pleiades and Aldebaran watch this scene from high above.

Black hole in another galaxy (artist's illustration)

Black Holes

Did Astronomers Spot a Black Hole in Another Galaxy? Maybe Not

Astronomers might have spotted a stellar-mass black hole in another galaxy — but not everyone agrees with what they found.

May 2021 lunar eclipse


A Near-Miss Total Lunar Eclipse

A near-total lunar eclipse will be widely visible across North America on the night of November 18–19. Dress warmly and go for it!


Astronomy in Space with David Dickinson

Russia Conducts Antisatellite Test; Space Station Crew Takes Cover

A Russian missile struck a defunct satellite early Monday morning, forcing International Space Station crew to shelter in place.

Chipping the Moon

Solar System

Has a Stray Piece of the Moon Become a Quasi-satellite of Earth?

A quasi-satellite of Earth, named Kamoʻoalewa, might actually be a chip off our Moon.

Twisted glass slab

Solar System

Did a Comet Explode Over South America 12,000 Years Ago?

Huge chunks and twisted slabs of dark glass are strewn across a patch of the Chilean Atacama Desert. Do they have a cosmic origin?

Nova-C Lander

Astronomy in Space with David Dickinson

NASA Announces Drilling Site on the Moon

NASA has revealed the landing site for Intuitive Machines’ ambitious drilling mission, set to launch for the Moon in 2022.

Labyrinth on western end of Valles Marineris, by Mariner 9

Spacecraft and Space Missions

Mariner 9: The Martian Semicentennial

A half century ago, Mariner 9 — our first orbiter at another planet — showed us the real Mars.

Spica points the way to low Mercury and Mars in the dawn, mid-November 2021

This Week's Sky At a Glance

This Week's Sky at a Glance, November 12 – 20

Venus, Jupiter and Saturn highlight the dusk. Mercury and Mars are a dawn challenge. And get ready for the barely-almost-total eclipse of the Moon.

International Dark-Sky Association 2021 Virtual Conference

Save Dark Skies

Under One Sky: Let's Address Light Pollution Together

Concerned about light pollution? Join a virtual conference this weekend that looks at ongoing global efforts to mitigate it.

a range of lines with blue dots on top and bottom creating a shape similar to a bird with spread wings. red and yellow dots run along the outline of the bottom half, all on a black background.

The Black Hole Files with Camille Carlisle

Third Gravitational-Wave Catalog Released

The latest results from LIGO, Virgo, and KAGRA bring several key revelations, including that black holes tend to come with certain masses.

Moon passing Venus at dusk, Nov. 7-8, 2021

Celestial News & Events

This Week's Sky at a Glance, November 5 – 13

In the evening sky the waxing Moon walks up past Venus, then Saturn and Jupiter day by day. And we're in the season of the Summer Triangle Effect.


Astronomy in Space with David Dickinson

Astronomers Announce Priorities for Next Decade

The National Academy of Science detailed the direction for astronomy and astrophysics today for the coming decade.

Stellar companion strips outer layers from massive star (art)

Stellar Science

Close Companions Help Stars Make More Carbon

Massive stars can produce twice as much carbon when they have a close binary companion, according to a new study. The result is a small but important step in understanding the cosmic origin of elements.

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