101–120 of 2,482 results
Waning crescent Moon passing Venus at dawn, July 21-22, 2025

This Week's Sky At a Glance

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

The waning crescent Moon joins Venus and Jupiter at dawn. In the dark of night, the Guardians of the Pole are no such things, except they are. And thereby hangs a tale. . .

Rasalhague (Alpha Ophiuchi) turns the Summer Triangle into a cut diamond.

This Week's Sky At a Glance

This Week's Sky at a Glance, July 11 – 19

In early dawn on Saturday the 12th, Taurus uses Venus to open his very rare, strikingly brilliant second eye. In the following days the eye slips out of place.

Comet 3I/ATLAS amateur view

Celestial Objects to Observe

Rare Interstellar Comet Buzzes Solar System

A newfound comet from a remote star system may become bright enough to see in amateur telescopes this November.

This Week's Sky At a Glance

This Week's Sky at a Glance, July 4 – 12

On Sunday night the Moon occults Pi Scorpii for almost all of North America. Elsewhere in Scorpius, the Cat's Eyes point side-eye to the Little Cat's Eyes.

Double Novae image V632 Lupi and V572 Velorum

Celestial Objects to Observe

See Dual Naked-Eye Novae, a Rare Cosmic Coincidence

What's rarer than a naked-eye nova? Having two of them at the same time!

Scorpius from Stellarium

Sky Tour Astronomy Podcast

July Podcast: Scorpius in the Spotlight

Let’s explore “what’s up” in the July sky. This month we’ll check on the planets' whereabouts, go on a "sat-seeing" tour, and chase down one of best know celestial critters: Scorpius. So grab your curiosity, and come along on this month’s Sky Tour episode.

Moon and Mercury at dusk, June 27, 2025

This Week's Sky At a Glance

This Week's Sky at a Glance, June 27 – July 6

Mercury, Regulus, and Mars drift apart as they descend in the western twilight. After dark, check out double stars in the head of Scorpius. . . where occultation action is coming up.

2-day-old crescent

Celestial Objects to Observe

Explore June's Dusky Crescent Moon

The Moon returns to the evening sky this week to show off its elegant crescent and invite us to tour its nightside.

Moon and Mercury low in the dusk, June 26, 2025

This Week's Sky At a Glance

This Week's Sky at a Glance, June 20 – 29

With summer finally here, summery Scorpius awaits you as night grows late. The Moon prepares to molt from old to new and greet Mercury in twilight.

Nova Lupi (V462 Lupi) June15

Celestial Objects to Observe

Bright Nova Lights Up Lupus Constellation

A newly-discovered nova in Lupus is on the rise and approaching naked-eye visibility. Here's how to see it.

This Week's Sky At a Glance

This Week's Sky at a Glance, June 13 – 22

Mars and Regulus are again 0.8° apart during the evening of June 17th for the Americas, this time with Mars more directly above the star

Smoky Strawberry Moon

Celestial Objects to Observe

When Wildfires Imperil Our Night Skies, See Double and Variable Stars

As wildfire season expands, observers across much of the country try to make do.

Moon rising in front of Scorpius, June 9-10, 2025

This Week's Sky At a Glance

This Week's Sky at a Glance, June 6 – 15

The yellow Honey Moon this week passes orange Antares. The Kite of Boötes turns upright. And is Capella circumpolar for you?

Aurora reflections

Celestial Objects to Observe

Major Flare Could Spark Severe Geomagnetic Storm Sunday Night, June 1st

Tips for viewing tonight's hoped-for aurora whether your skies are clear or smoky.

Moon’s phases in perspective

Sky Tour Astronomy Podcast

June Podcast: A Month of Moonwatching

Let’s go on a 13-minute tour of “what’s up” in the June nighttime sky. This month we’ll celebrate the Sun’s solstice; follow the Moon through all its phases and close encounters; track down a couple of faint constellations; and shine a spotlight on the star Arcturus. So grab your curiosity, and come along on this month’s Sky Tour episode.

Moon passing Mars and Regulus, May 31 - June 1, 2025

This Week's Sky At a Glance

This Week's Sky at a Glance, May 30 – June 8

The waxing Moon poses with Mars, then Regulus, in the west. Double stars await near Vega, while another double star far across the sky points the way.

Milky Way snow globe

Observing

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!

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

This Week's Sky At a Glance

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.

M40 up close

Celestial Objects to Observe

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.

Boötes constellation

Celestial Objects to Observe

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.”