861–880 of 6,711 results
series of images of blue Neptune with bright clouds appearing and disappearing over nearly 30 years

Solar System

Solar Cycle May Trigger Clouds on Neptune

Nearly 30 years of observations indicate that Neptune’s clouds and brightness vary with the Sun’s activity.

Comet Nishimura C/2023 P1

Celestial News & Events

New Comet Nishimura May Become Naked-Eye Bright

Comet Nishimura is quickly brightening in the morning sky and may be faintly visible with the naked eye next month. And on August 24th observers in North America will be treated to an occultation of Antares.

Chandrayaan 3

Astronomy and Society

India’s Chandrayaan 3 Lands on the Moon; Russia's Luna 25 Crashes

In a first, India’s Chandrayaan 3 soft-lands in the lunar south pole region of the Moon.

Eclipse map

People, Places, and Events

2024 Total Solar Eclipse: 25 Events, Festivals, and Places to Stay

Some ideas for those who still need a place to go on April 8, 2024, to see the total solar eclipse.

dark hole surrounded by hot disk of swirling gas and shooting out a jet from its rotation axis

Black Holes

Black Hole May Have Formed by Direct Collapse

Astronomers may have spotted a supermassive black hole in the early universe that formed when a gargantuan gas cloud imploded.

Moon passing Spica at dusk, Aug 9-21, 2023

Celestial News & Events

This Week's Sky at a Glance, August 18 – 27

The waxing Moon passes Spica and then will occult Antares for much of North America. Saturn reaches opposition this week. The Andromegasus Dipper scoops up as summer wanes.

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.

Magnetic massive star shines blue with dipole field

Stellar Science

Astronomers Find Strange Star Is a Powerful Magnet

Astronomers have found a star that has a magnetic field rivaling the strongest magnet humans have ever built — and it might explain the origin of highly magnetic cinders known as magnetars.

Diagram of Moon-Earth orbit

Night Sky Sights

How Rare Is a Solar Eclipse?

There are two solar eclipses every year — so why are they so rare?

Tracing mud cracks on Mars

Astrobiology

What Mud Cracks Mean for Life on Mars

Mud cracks are evidence for sustained wet-dry cycles on ancient Mars, which might have provided conditions amenable to life (with caveats).

2016 Perseids

Celestial News & Events

Get Ready for a Great Perseid Meteor Shower

The Perseids are here! With no Moon to spoil the show it's time to break out the lawn chairs, sit back, and watch the comet dust fly.

Waning crescent Moon passing Pollux and Castor at dawn, Aug. 12-14, 2023

Celestial News & Events

This Week's Sky at a Glance, August 11 – 20

The Perseid meteors come rushing in, and peak Perseid night ends with the waning crescent Moon triangulating Castor and Pollux. Vega and Sagittarius culminate after dark. Scorpius lays itself down.

Space Missions

Russia Heads for the Moon for the First Time Since 1976

The launch of Russia’s Luna 25 lander heralds the nation’s return to lunar and planetary exploration.

Near-infrared image shows the Ring Nebula in yellow (central area) and purple (outer ring)

Exoplanets

Webb Views the Ring Nebula and Earendel in a New Light

This week, James Webb Space Telescope reveals new details in the Ring Nebula and shows that the most distant known star isn't alone. Meanwhile, patient astronomers have collected 17 years' worth of images of the super-Jupiter Beta Pictoris b.

Blue-toned comet image

Solar System

Comet 46P/Wirtanen: All Dust, No Ice

Where is all of the water around hyperactive comets coming from? A recent article asked if it could be “Ice, Ice, Maybe?” and concluded that it likely isn’t.

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.

Chandrayaan 3

Space Missions

India's Chandrayaan 3 Reaches for the Moon (Updates with Video)

India is headed back to the Moon with its ambitious new Chandrayaan 3 mission.

Voyager 2

Space Missions

Contact Briefly Lost with Voyager 2

NASA detected a faint "heartbeat" signal from Voyager 2, after an erroneous command caused the spacecraft to lose contact with Earth.

The Moon with Jupiter and the Pleiades, dawn of Aug 8 and 9, 2023

Celestial News & Events

This Week's Sky at a Glance, August 4 – 13

We're approaching the peak of the Perseid meteors. Vega claims the zenith as the Teapot claims the south. In twilight, Mars has a friendly but not very intimate date with Mercury.

Moon and Saturn Aug 29-30 2023

Night Sky Sights

August Podcast: Blue Moon and Perfect Perseids

Many skywatchers look forward to seeing the Perseid meteors every August, and this month’s Sky Tour episode why they’ll be especially good this year. You’ll also learn what's so special about the full Moon that falls on the night of August 30–31.