437 results

Explore the Night with Bob King

Fomalhaut: A Crazy-Wide Triple Star

Lonely Fomalhaut turns out to have plenty of company. Learn how to find its two remarkably distant stellar companions.

Burst of light in the night

Explore the Night with Bob King

How to Never Miss an Aurora

Learn exactly how and when to expect the next display of the northern lights with a few easy-to-use online tools.

Explore the Night with Bob King

9,096 Stars in the Sky—Is That All?

Ten thousand stars bedazzle the eye on a dark night. Wait, how many?

Celestial News & Events

Meet My Variable Friend SS Cygni

Get acquainted with SS Cygni, the sky's brightest cataclysmic variable star. It's guaranteed to keep you on your toes.

Fortuitous intersection

Celestial News & Events

See Saturn's Moon Rhea Hide a Star

Watch as the moon Rhea steals a star from the sky for nearly a minute on September 12th.

Crescent cradles the 'old moon'

Moon

Earthshine, the Moon's Darker Side

Explore the Moon's dark side with the aid of earthshine.

Comet and nebula - near and far

Celestial News & Events

Happy Times for Comet Watchers

Seize the moment and bookend your next clear night with two fine telescopic comets: Jacques at dusk and Oukaimeden at dawn.

Explore the Night with Bob King

Close Venus-Jupiter Conjunction on August 18th

Here's your invitation to view a spectacular close conjunction of the sky's two brightest planets, Venus and Jupiter, before dawn on Monday morning.

Graceful arc of shocked gas

Deep Sky

How to See Cygnus's Other Veil Nebula

You'll be entering uncharted territory when you seek out this little known 'Shadow of the Veil' in Cygnus this summer.

Proof you can see Earth's shadow even from a big city

Daylight Phenomena

Earth's Shadow Creeps Up on Us Every Night

The next time you're out watching a sunset, turn around and relish the mighty shadow of Earth looming just behind your back.

Faculae along solar limb on July 18, 2014

Explore the Night with Bob King

Blank Sun? Faculae to the Rescue!

Fascinating faculae provide a way for anyone with a small telescope to track the ups and downs of the solar cycle — even when there are no sunspots.

A bright Iridium flare

Space Satellites

Predictive Prowess: See an Iridium Flare

Channel your inner superpower by looking up at the night sky precisely when a dazzling blaze of light is beamed to Earth from outer space.

True double samples

Explore the Night with Bob King

See Summer's Best Naked-Eye Double Stars

Not every set of closely paired stars requires binoculars or a telescope to "split". Here's a guide to summertime doubles you can tackle with your eyes alone.

Moon and Saturn on July 7, 2014

Celestial News & Events

Two Moon-Planet Conjunctions Juice Up July

On July 5th, the Moon has a remarkably close brush with Mars, followed two nights later by a similar rendezvous with Saturn.

Two-faced Iapetus

Celestial News & Events

Iapetus Comes Over to the Bright Side

Astronomers now know the secret of this moon's strange two-faced appearance, but it's still remarkable to watch the "now you see it, now you don't" performance as it moves around Saturn.

Explore the Night with Bob King

Summer Quest for Noctilucent Clouds

Noctilucent clouds form at the boundary between Earth and space. Their electric blue billows incite the imagination and inspire us to keep watch at dusk for their arrival.

Two-tailed Comet PanSTARRS

Explore the Night with Bob King

Comet PanSTARRS Keeps Getting Better

Since C/2012 K1's discovery two years ago, this first-time visitor from the outer solar system has brightened steadily and is now within reach of a small telescope and even binoculars.

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