1401–1420 of 2,482 results
Blue Q-tip

Observing

Catalina Comet Sails Into Northern Skies

Comet Catalina returns this month with naked-eye potential. Follow its every move with our guide and maps.

This Week's Sky At a Glance

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

As predicted, this has become a great year for the Taurid meteor shower. Occasional brilliant meteors should continue through about Tuesday, November 11th.

Far but Familiar

Observing

Triple Treasure in Triangulum's Pinwheel

Travel 2.7 million light-years from home to the Pinwheel Galaxy, where we'll visit a supergiant star, an extragalactic globular cluster, and one of the largest nebulae in the known universe.

Taurid 2005 by Hiroyuki Iida

Observing

Be Alert for Taurid Fireballs This Week

If you see a really bright autumn fireball, it might be a Taurid meteor — a fragment of Comet 2P/Encke.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, October 30 – November 7

The long-lasting Taurid meteor shower is sparse, but a high proportion of its meteors are bright. This year we're predicted to see more of them than usual.

Sky Tour Astronomy Podcast

Tour November's Sky: Treats at Dawn & Dusk

Bright planets are putting on a show in the predawn sky, and evenings feature a mythical horse flying upside-down across the sky.

The Moon Unmagnified

Observing

How to See Lunar Craters with the Naked Eye

Who says you need a telescope to see craters on the Moon? Here's how to find a half-dozen with just the naked eye.

Green laser pointer

Observing

Some Pointers on Using Laser Pointers

Many stargazers use handheld laser pointers to show the way to stars and constellations. But these devices can be dangerous if used carelessly. Here are some tips on how to avoid trouble.

This Week's Sky At a Glance

This Week's Sky at a Glance, October 23 – 31

Big doings at dawn! High in the east, Venus and Jupiter go through a close conjunction, while Mars looks on just below. Mercury lurks near the horizon.

Orbit of asteroid 2015 TB145

Solar System

Close-in Asteroid Offers Halloween Treat

The recently discovered asteroid 2015 TB145 won't come especially close to Earth on October 31st, but it's big enough to be seen in medium-size backyard telescopes.

Multi-faceted beauty

Observing

Discover a Dozen Clusters in the "W"

Open your bag wide as we go trick-or-treating in the "W" of Cassiopeia, home to more than 100 star clusters.

This Week's Sky at a Glance logo

This Week's Sky At a Glance

This Week's Sky at a Glance, October 16 – 24

The Moon hangs over Saturn and Antares in the southwest at dusk. After nightfall, W-shaped Cassiopeia stands on end halfway up the northeastern sky.

Dust with bling

Observing

Take the Gegenschein Challenge

How and when to see the gegenschein, cousin of the zodiacal light and one of the greatest night sky naked-eye challenges.

This Week's Sky At a Glance

This Week's Sky at a Glance, October 9 – 17

In early dawn on Saturday morning the 10th, look east for the waning crescent Moon below the Venus-Jupiter-Mars collection.

Draconid radiant

Stellar Science

October's Unpredictable Draconid Meteors

Watch for any slow, unusual meteors starting at nightfall tonight and tomorrow.

Pop goes the nova

Observing

"Blink" a Nova Tonight

Like people doing good imitations, novae often mimic planetary nebulae. Read on to learn how to watch the evolution of these tricksters using a common nebula filter.

This Week's Sky At a Glance

This Week's Sky at a Glance, October 2 – 10

Daily sky events among the ever-changing Moon, planets, stars and constellations, from Sky & Telescope magazine, the essential guide to astronomy.

Moon-Jupiter-Mars on October 9th

Sky Tour Astronomy Podcast

Tour October's Sky: Predawn Planet Pileup

Early risers will be treated to wonderful groupings of bright planets, and evening sky offers excellent stargazing as well.

Near miss

Occultations

Moon Hides Hyades, Occults Aldebaran Friday

After a late-night ramble through the Hyades cluster, the waning gibbous Moon will cover up the bright star Aldebaran for observers across North America Friday morning.

Total lunar eclipse on Sept. 27-28, 2015

Observing

Ready for Tonight's Total Lunar Eclipse?

On the night of September 27–28, the full Moon will plunge completely through Earth's shadow for the last time until January 2018.