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Stages of lunar eclipse arc over the Sydney Opera House

Stargazer's Corner: Adventures Under the Night Sky

Fortune Favors the Prepared Astrophotographer

An unexpected total lunar eclipse surprises an amateur astrophotographer.

Crescent Moon, Venus, Jupiter in twilight, Feb. 21-22, 2023

This Week's Sky At a Glance

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.

Orion Nebula with T Ori

Variable Stars

Catch Birth Flickers of Budding Suns in Orion

Three flickering stars in Orion offer insight into what life looks like before the main sequence.

Mars with Aldebaran and the Pleiades, mid-February 2023

Celestial News & Events

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.

Mars, Aldebaran, and the Pleiades in late twilight, Feb. 10, 2023

This Week's Sky At a Glance

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.

Comet ZTF (C/2022) and Mt. Etna


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.

Orion and nearby constellations

Sky Tour Astronomy Podcast

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.

Comet ZTF E3 dust tail


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

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.

2023 BU close approach

Celestial Objects to Observe

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.

Crescent Moon passing Venus and Saturn in conjunction, Jan. 22-23, 2023

Celestial News & Events

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!

Venus and Saturn at dusk, Jan. 13, 2023,

This Week's Sky At a Glance

This Week's Sky at a Glance, January 13 – 21

Saturn starts the week well above bright Venus in twilight. Watch them close in on each other toward their conjunction on the 22nd. Jupiter and fading Mars shine high. Sirius sparkles below Orion, and binocular Comet ZTF enters its best three weeks.

Alpha Persei Cluster (Melotte 20)

Meet the Stars

Meet Mirfak, the Supergiant of Perseus

Mirfak, the brightest star in the constellation Perseus, is a yellow supergiant star with an uncertain fate.

Cloud map for 2023's annular solar eclipse

Celestial News & Events

Solar and Lunar Eclipses in 2023

Although no total lunar eclipses occur this year, skywatchers can look forward to two “central” solar eclipses — including an annular event in October whose path runs from Oregon through Texas.

Moon crossing Gemini at dusk, Jan. 6-7, 2023

Celestial News & Events

This Week's Sky at a Glance, January 6 – 14

Saturn approaches Venus in twilight, Jupiter and Mars ride high, and Mare Orientale peeks around the edhe of the Moon. And, try exploring the many double stars in Orion's Sword.

Winter Pair-a-gon

Double Stars

Explore Double Stars in the "Winter Pair-a-gon"

The Winter Hexagon is not only key to finding six of the season's most prominent constellations but also a gateway to a more than a half-dozen delightful double stars.

Solar eclipse series

Celestial Objects to Observe

What to Look For & When During a Total Solar Eclipse

Look for these astronomical and Earthbound phenomena during the total solar eclipse on April 8, 2024.

Venus and Saturn on Jan 22 2023

Sky Tour Astronomy Podcast

January: Goodbye, Saturn (Hello, Venus)

For those well north of the equator, January’s long nights provide lots of time to enjoy the starry sky — and the stars of winter are spectacular! This month’s celestial highlights include a close pass of Saturn and Venus, a strong meteor shower, and much more. Our fun and factual Sky Tour podcast provides all the details.

Venus and fading Mercury after sunset, Dec. 31, 2022

This Week's Sky At a Glance

This Week's Sky at a Glance, December 30 – January 7

Venus creeps up, Saturn sinks down; in three weeks the two shall meet. The Moon meets Mars Tuesday. Orion comes into his own to rule the winter, and Sirius emerges below him.