1–20 of 35 results
Deep image of V1405 Cas nova

Celestial News & Events

Bright Nova Erupts in Cassiopeia

A new nova in Cassiopeia, discovered on March 18th, is bright enough to see in a small telescope.

Algol

Variable Stars

Take a Roller Coaster Ride with Algol, a Fast Eclipsing Binary

How would you like to see a star drop two magnitudes in the time it takes to eat dinner? Easy to do. Just check out one of these fast eclipsing binaries — they'll make your head spin.

Betelgeuse telescopic view

Explore the Night with Bob King

Is Betelgeuse Approaching a Crossroads?

Astronomers all over are waiting with bated breath to see what Betelgeuse will do next. Is it going to start brightening again on February 21st? Or will it continue to surprise?

A bright supernova

Celestial Objects to Observe

The Latest on Betelgeuse, Plus a Bright Supernova and New Comet Iwamoto

The sky provides. This winter, the fading of Betelgeuse caught us all by surprise. Now, as January wraps up, we can add a new comet discovery and a supernova bright enough to see in a 6-inch telescope to an ever-growing list of seasonal sky wonders.

Betelgeuse in Orion

Explore the Night with Bob King

Betelgeuse is Dimming . . . Why?

The bright star Betelgeuse has faded to a historic low as astronomers try to figure out why.

Deep Sky

Hunting Bright Variable Stars in M5 and M13

Globular clusters are packed with variable stars, some of which are easy to see and follow in amateur telescopes. We explore M5 and M13, two of the season's finest.

Explore the Night with Bob King

Twinkle, Twinkle Quasi-Star — 12 Quasars for Spring Evenings

Quasars are among the brightest and most distant objects in the universe. Many are visible in amateur scopes if you know just where to look. We'll help you track them down.

Explore the Night with Bob King

Trick-or-Treat with the Seven White Dwarfs

In the Halloween spirit, we pay a visit to the cosmic dead, those tiny stars that should just fade away but always seem to be causing trouble instead.

Crown in the western sky

Variable Stars

R Coronae Borealis Awakes and Pluto Blocks a Star

Sometimes, it's just as exciting to watch a celestial object fade or disappear as it is to see it explode. We celebrate the "return" of a mysterious variable star and prepare for Pluto to occult a star.

R Leporis Carbon Star

Variable Stars

Observing Carbon Stars

Expand your observing plans by adding a few of these red-orange carbon stars.

Celestial News & Events

Dwarf Nova V392 Persei Goes Big — It's Now Binocular Bright

In a rare move, a sleepy cataclysmic variable blows its top and suddenly becomes a nova.

Celestial Objects to Observe

Put a Little Bit of Leo in Your Life

We lift the Lion's paw to find a bright, red variable star, a germinating planetary nebula, galaxies rarely visited, and a diversity of doubles.

Explore the Night with Bob King

Mira Makes January Nights "Wonderful"

Mira, one of the easiest-to-observe pulsating variable stars, reaches peak brightness this month. Don't be shy, come look her in the eye. 

Variable Stars

Invite Ross 128 Over This Thanksgiving

With exoplanet Ross 128b in the news, we pay a visit to the star that sustains this potentially habitable exoplanet.

Celestial News & Events

8th-magnitude Nova in Sagittarius

A nova in Sagittarius, discovered a few nights ago by a Japanese amateur, has become bright enough to see in binoculars.

Two For T

Variable Stars

Is T CrB About to Blow its Top?

The recurrent nova T Coronae Borealis last made a splash just after World War II. Does its current restive state hint at an imminent outburst?

Explore the Night with Bob King

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.

Celestial Objects to Observe

The Top 12 Naked-Eye Variable Stars

Lurking in the seemingly changeless constellations are a few inconstant stars that pulse and eclipse. Here are a dozen variables that are easy to observe.

Variable Stars

Epsilon Aurigae's Eclipse Begins

Robin Leadbeater of Wigton, UK, has reported the first sign of the long-awaited eclipse of Epsilon Aurigae, one of the most remarkable eclipsing variable stars in the sky.

Variable Stars

Beta Lyrae

Beta Lyrae, an eclipsing binary, is one of the brightest and easiest-to-find variable stars in the sky.

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