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The crescent Moon shines with Venus in twilight Dec. 4, 2024

Celestial News & Events

This Week's Sky at a Glance, November 29 – December 8

This Wednesday evening, the crescent Moon will beautifully partner with Venus. And, for these next two weeks we get the earliest sunsets of the year.

Observing with 20-inch Dob

Night Sky Sights

Hunting Dwarf Galaxies in the Sooner State

A dark-sky quest leads to encounters with two Milky Way companion galaxies and other dim delectables.

heavily spotted star

Exoplanets

Charting the Cosmic Shoreline: Which Planets Have Atmospheres?

Which of the nearly 6,000 known exoplanets have atmospheres? With help from the James Webb Space Telescope, astronomers are inching closer to an answer.

Artist's illustration of pulsar Geminga

Stellar Science

Ultra-Energetic Electrons from Our Astronomical Backyard

Scientists have found the highest-energy cosmic-ray electrons yet, and their source might be surprisingly nearby.

Venus and sinking Mercury in twilight, Nov. 22, 2024

Celestial News & Events

This Week's Sky at a Glance, November 22 – December 1

Last call for Mercury! On the opposite side of the sky, Jupiter and Mars climb up ever earlier. And the waning crescent Moon occults Spica for eastern and central North America.

a large orange orb with a smaller orb on its left side with a large curve of dust on its left side

Exoplanets

Unveiled: The Youngest Transiting Exoplanet Ever Detected

A passing star may have warped a veil of dust to expose the embryonic planet.

ice river winding through shallow rocky valley

Solar System

Icy Rivers May Have Flowed on Ancient Mars

A polar cap of carbon-dioxide ice may have provided the thermal blanket needed for rivers and a huge lake to form in the planet’s southern highlands.

Makemake and its moon

Solar System

Makemake’s “Hot Spot”: Icy Volcano or Dusty Ring?

Even though it’s nearly 4½ billion miles from the Sun, far-flung Makemake has surprised observers with a warmer-than-expected temperature that is challenging to explain.

a large green circle that is partially transparent against a black background with white dots as stars

Galaxies

A Bubbly Origin for Odd Radio Circles

Discovered in 2019, odd radio circles (ORCs) are among the newest and most mysterious astrophysical phenomena. New research examines how bubbles blown by black hole jets could create these striking features.

Venus and fainter Mercury in twilight in the middle weeks of November 2024

Celestial News & Events

This Week's Sky at a Glance, November 15 – 24

Venus and Mercury continue as a duo in the western twilight this week. The Moon visits Jupiter, then Mars. Saturn shines lonely below the Great Square.

on the left, a black disk with a white halo against a dark blue background.on the right, a small black dot surrounded by a light orange halo and then a dark orange halo against a black background

Stellar Science

New Views of Vega’s Dusty Disk

High-resolution images reveal the debris disk around Lyra’s brightest star to be exceedingly smooth. If any planets lurk therein, they must be small.

Spica reappearance Chicago

Celestial News & Events

Watch the Moon Occult the Pleiades, Spica too!

The Moon crosses the Pleiades this week, then heads east for the year's most dramatic Spica occultation.

an aerial shot of a large cement disc in the midst of trees

Professional Telescopes

Arecibo’s Powerful Radar May Have Contributed to the Telescope’s Demise

The Arecibo Observatory’s radar system may have produced currents that weakened the zinc sockets holding the cables in place, new report says.

Venus and fainter Mercury in twilight in the middle weeks of November 2024

Celestial News & Events

This Week's Sky at a Glance, November 8 – 17

The stars betray that we've tipped from the season of warm evenings to the cold (or at least crisp). And the Moon this week skims Saturn, then the Pleiades.

FRB heartbeat

Stellar Science

A Radio Burst from a Giant "Dead" Galaxy

Exotic magnetars make brief, powerful flashes of radio waves — but a new discovery suggests there may be more than one way to make a magnetar.

Constellation diagram depicts Grus, the Crane

Night Sky Sights

Get to Know the Southern Constellation Grus, the Crane

Take a flight through Grus, one of the famous “southern birds” constellations.

Tessera on Venus

Solar System

Oldest and Largest Impact Crater Found on Venus

Scientists have found possibly the oldest and largest crater on Venus — and it's like none they've ever seen on our sister planet.

Artist's concept of the filaments of supernova remnant Pa 30

Stellar Science

Astronomers Map a Dandelion Supernova

Astronomers have, for the first time, mapped the 3D filamentary structure of a famous dandelion-shaped supernova remnant.

a black dot surrounded by a swirling disk of hot gas, which is being siphoned from a nearby orange star

Black Holes

Newfound Stellar Companion May Explain Black Hole System

Astronomers have identified a distant stellar tagalong to the binary system V404 Cygni.

Catch the thin crescent Moon paired with Venus in Monday's twilight (Nov. 4, 2024)

Celestial News & Events

This Week's Sky at a Glance, November 1 – 10

The thin crescent Moon pairs beautifully with Venus low in Monday's twilight. And be on the lookout for any Taurid fireballs this week!