1–20 of 54 results
Hevelius atlas Mira

Variable Stars

Nights with Mira, a Most Wonderful Star

Mira the Wonderful is back! Of course, it's always been there, but now it's near maximum brightness and easily visible with the unaided eye.

Nova Cen early image

Variable Stars

Australian Astronomer Discovers Back-to-back Novae!

John Seach hit the jackpot, discovering novae in both Centaurus and Sagittarius within a day of each other.

Variable Stars

The Mystery of Leslie Peltier's "Two Tiny Diamonds"

How a determined amateur astronomer may have hit on the identity of a Cepheid variable double star described by a beloved author.

Double Novae image V632 Lupi and V572 Velorum

Variable Stars

See Dual Naked-Eye Novae, a Rare Cosmic Coincidence

What's rarer than a naked-eye nova? Having two of them at the same time!

Nova Lupi (V462 Lupi) June15

Variable Stars

Bright Nova Lights Up Lupus Constellation

A newly-discovered nova in Lupus is on the rise and approaching naked-eye visibility. Here's how to see it.

Smoky Strawberry Moon

Variable Stars

When Wildfires Imperil Our Night Skies, See Double and Variable Stars

As wildfire season expands, observers across much of the country try to make do.

V7993 Sgr nova finder map

Variable Stars

New Nova in the "Teapot," Algol Blinks, and Uranus Occults a Star

A new nova for early risers plus three fun observing projects for the week ahead.

Dwarf nova ilustration

Variable Stars

T Coronae Borealis Isn't the Only Star Ready to Blow — Meet U Gem

As we wait on recurrent nova T CrB, dwarf nova U Geminorum is teeing up for its next 8-magnitude outburst.

R Leo with Leo's Sickle

Variable Stars

Take a Look at R Leonis, Leo's Giant Ticker

Big, bright and red, the Mira variable R Leonis portends the Sun's fate. A pair of binoculars is all you need to get acquainted.

Betelgeuse close-up

Variable Stars

Is Betelgeuse Fading Again?

Betelgeuse has dipped nearly half a magnitude since late January. Could it be headed for another Great Dimming Event? We also take a look at this spring's "other" eclipse.

Nova Persei expansion

Variable Stars

Time-lapse Animations Reveal a Universe in Transformation

Deep-sky objects may appear static throughout our lifetime but by carefully "blinking" archival and current images we can discern real changes in their appearance.

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.

Geminid over Tucson

Variable Stars

Catch the Geminid Meteor Shower; Plus, Watch RW Cephei Fade

The luminous Geminid meteor shower returns. We also meet a binocular-bright star that may be experiencing Betelgeuse-like convulsions.

Titan and Tethys

Variable Stars

Titan Occults a Bright Star, Mira Awakens, and Comet PanSTARRS Shines

Pick one or see them all. July offers a potpourri of celestial events for both naked-eye observers and telescope users that include a rare occultation by Saturn's moon Titan, a bright comet, and Mira at maximum.

RS Oph animation

Variable Stars

Recurrent Nova RS Ophiuchi Just Blew its Top!

The recurrent nova RS Ophiuchi just went into outburst — its first burst in 15 years — and it's bright enough to see with the naked eye

NGC 5453 globular cluster

Variable Stars

In Heaven with M7, a Portal Into the Deep

M7 in Scorpius is one of the brightest, most beautiful open clusters in the sky. It's also "home" to a half-dozen other delectable deep-sky sights.

M56 globular

Variable Stars

Summer Nights Offer Splendid Sights in Lyra

Lyra, the Lyre, offers a wonderful assortment of double stars and deep-sky objects to keep you up at night. Break out your binoculars and telescope and join me for a summertime ramble.

Red nova

Variable Stars

Bright Nova in Hercules on a Roller Coaster Ride

A new bright nova discovered in Hercules at 8th magnitude briefly rose to naked-eye visibility. It's currently easily visible in a pair of binoculars.

Hubble photo of M3

Variable Stars

Hunting Barnard's Variable in the Globular Cluster M3

We beat a path through a forest of stars to find the first variable star ever discovered in a globular star cluster.

Three novae

Variable Stars

A Bouquet of Novae Brightens April Nights

With the recent discovery of Nova Scorpii 2021 earlier this week, three bright stellar explosions are now visible in small telescopes from dusk till dawn.