SUNSET: 
This Week's Sky at a Glance, March 17 – 26
The crescent Moon visits Venus. The Orange Triangle turns nearly equilateral. And as evening grows late, Arcturus begins to dominate the low northeast. It's turning spring.
Anticipating Comet Tsuchinshan-ATLAS (C/2023 A3)
Newly discovered Comet C/2023 A3 might reach naked-eye brightness when it flies past Earth in 2024. Check out our forecast of what to expect to see in the months ahead.
Explore the Night with Bob King
Tell Time with the Big Dipper; See Ceres Transit a Spiral Galaxy
Phone battery dead? Learn how to tell time with the Big Dipper. Also, don't miss a remarkable transit of Ceres in front of the bright spiral galaxy M100.
This Week's Sky at a Glance, March 10 – 19
Venus and Jupiter widen in twilight. Mars, Aldebaran, and Betelgeuse form a triangle of similar orange sparkles. And there's lots to explore with optical aid off the trailing foot of Gemini, including the Toes.
This Week's Sky at a Glance, March 3 – 12
Venus and Jupiter draw majestically apart in the evening twilight, 1° farther each day. Much higher, Mars makes its third pass in the last five months between the horntip stars of Taurus.
Aurora Season Is Underway
These are the nights to get ready for the auroras — and tonight may be your lucky night. Not only is the current solar cycle swiftly intensifying, March is one of the best times of the year to see the northern lights.
March: The Winter Hexagon
As the Northern Hemisphere edges toward the March equinox and beyond, stargazers have an abundance of brilliant stars overhead as darkness falls. Anchoring the celestial parade is Orion, the Hunter. Download or listen to this month’s Sky Tour to learn about — and how to spot — the Winter Hexagon of big, beautiful winter stars.
This Week's Sky at a Glance, February 24 – March 5
Venus and Jupiter, the two brightest celestial objects after the Sun and the Moon, shine together in the western twilight before, during, and after their March 1st conjunction.
Stargazer's Corner: Adventures Under the Night Sky
Fortune Favors the Prepared Astrophotographer
An unexpected total lunar eclipse surprises an amateur astrophotographer.
This Week's Sky at a Glance, February 17 – 26
Venus and Jupiter put on a dramatic show in twilight, as they creep toward each other for a March 1st conjunction. The crescent Moon passes though, almost kissing Jupiter on Wednesday the 22nd.
Catch Birth Flickers of Budding Suns in Orion
Three flickering stars in Orion offer insight into what life looks like before the main sequence.
This Week's Sky at a Glance, February 10 – 19
Comet ZTF is fading and receding into the distance. On the other hand, it's now conveniently placed high overhead in early evening in a moonless sky; the waning Moon doesn't rise until late.
This Week's Sky at a Glance, February 3 – 12
Comet ZTF is still near its brightest, moonlight and all. Around the Big and Little Dog Stars, trace out the stick-figure patterns of the big and little dogs. A ghostly unicorn haunts the inside of the Winter Triangle.
Understanding the Tails of Comet ZTF (C/2022 E3)
We explore Comet ZTF's remarkable trio of tails and share the latest news and photos.
February: Winterʼs Dazzling Stars
February 4th marks the midway point between Decemberʼs solstice and the March equinox. Celebrate that celestial milestone by getting outside to gaze in awe at the amazing array of bright stars youʼll find overhead on February evenings.
See Comet ZTF (C/2022 E3) Dash Between Big and Little Dippers
Forget the hype and go outside to enjoy the real thing — a relatively bright comet you can see in binoculars from a dark sky.
This Week's Sky at a Glance, January 27 – February 5
Comet ZTF is at its best this week — but every night moonlight encroaches on the scene until a later and later hour. Along the way, the Moon occults Mars for the southern U.S. and again forms isosceles triangles with naked-eyestars.
Tiny Asteroid 2023 BU to Miss Earth
A recently discovered asteroid will pass exceptionally close to Earth on January 26th. Here's how to see it. Also, Comet ZTF (C/2022 E3) is brightening nicely, with three tails visible in binos.
This Week's Sky at a Glance, January 20 – 29
Venus and Saturn have a close conjunction in twilight. Comet ZTF heads into its best week. And Betelgeuse overtakes Sirius ever earlier in the night.
The Moons of the Solar System
Not so long ago, astronomers thought only a few dozen moons orbited the planets of our solar system. Today, the total count tops 170!
