
This Week's Sky at a Glance, November 24 – December 3
This Tuesday the 28th we will see the Moon rise in twilight as far north as it possibly can. Do you know why?

How Did the Ancients Predict Eclipses? The Saros Cycle
Before the advent of computers or even a working theory of the solar system, the ancients predicted solar eclipses. How did they do it?

Watch Uranus's Moon Titania Cover a Star Monday Night
Observers across much of the U.S. and Canada have a unique opportunity Monday night, November 20–21, to see Uranus's brightest moon occult a star.

This Week's Sky at a Glance, November 17 – 26
The bright gibbous Moon this week passes Saturn, then Jupiter, inviting telescopes of all sizes. And as winter approaches, Orion rises earlier and earlier.

Explore the Night with Bob King
Jupiter's Great Red Spot Just Keeps Getting Smaller
Jupiter's Great Red Spot may be reaching a milestone this year by shrinking to its smallest size in recorded observational history.

Asteroid Will Cover Betelgeuse, May Reveal Its Visible Surface
Astronomers are gearing up for an unusual celestial event: an asteroid’s occultation of an iconic star.

This Week's Sky at a Glance, November 10 – 19
The crescent Moon slips down into the sunrise and then up in the afterglow of sunset, guiding the way to the last stars of Sagittarius right after dark. A few days later it passes Saturn.

This Week's Sky at a Glance, November 3 – 12
The Great Square, now upright, guides your way down to Fomalhaut and Diphda and, farther down, Alpha Phoenicis – a chance to add a new constellation to your life list. And plan to catch the Moon-Venus pairing in early dawn on the 9th.

Explore the Night with Bob King
How to See Freaky Starlink "Cluster Flares", Plus the Latest on Comet Lemmon
Alien invasion or flares from satellites in multiple orbits? It depends on your point of view. We also check in on Comet Lemmon, poised to possibly reach binocular-visibility.

This Week's Sky at a Glance, October 27 – November 5
The full Moon on October 28th shines near full Jupiter at opposition this week. Telescopically, Jupiter this week is as big as you'll ever see it,

This Week's Sky at a Glance, October 20 – 29
The waxing Moon in the evening sky visits Saturn, then Jupiter. And as Halloween approaches, Arcturus becomes the Ghost of Summer Suns.

Explore the Night with Bob King
Orionid Meteors Fly; Two Moons Shadow Jupiter
Bundle up and enjoy the Orionid meteor shower under moonless skies this week. Don't miss the warm-up act, either, when two of Jupiter's moons pair up in a captivating double-shadow transit.

Annular Solar Eclipse Dazzles Watchers Across North America
The weekend's solar eclipse dazzled observers throughout the U.S. and Mexico. Sky & Telescope editors and contributing editors report.

Where to Watch the October 14th Annular Solar Eclipse Online
If you can't see the annular solar eclipse in person, we've got some online viewing opportunities for you.

This Week's Sky at a Glance, October 13 – 22
The week's big event is the Moon stepping on the Sun on Saturday the 14th. But the Moon's not done. Several days later it steps squarely on the handle of the Sagittarius Teapot, then on Herman's Cross. Show-off. Image: S&T's Sean Walker resolves Io half lit as it slips into Jupiter's shadow.

When It's Eclipse Decision Time, How Do You Decide Where to Go?
Satellite imagery will prove invaluable in making decisions on the day of the annular solar eclipse.

Comet 12P/Pons-Brooks (aka the "Millenium Falcon" Comet) Flares Again!
Comet 12P/Pons-Brooks has awakened again from its recent slumbers with a fresh outburst. It's now bright enough to see in a modest telescope.

The History of Baily’s Brilliant Beads
Discover the observations of astronomer Francis Baily as he watched sunlight bead along the lunar limb during an 1836 annular eclipse.

This Week's Sky at a Glance, October 6 – 15
A partial/annular eclipse of the Sun washes across the Americas on Saturday the 14th. Four days before, the waning Moon and Venus pair up in early dawn with Regulus glimmering between them.

Explore the Night with Bob King
Comet Hartley Comes Home Again; Gegenschein-gazing
Get acquainted with Comet 103P/Hartley. It's been a dozen years since its last bright apparition. While you're at it challenge yourself to spot the elusive gegenschein.