21–40 of 365 results
Hubble photo of M3

Deep Sky

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

Celestial Objects to Observe

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.

Solar System

Make the Most of Comet ATLAS

Bright comets will be scarce this year, but you can see one of the better ones this month as it races from Aquila to Canes Venatici. In other news, a new, bright nova has flared in Sagittarius.

Europa eclipses then occults Io

Celestial Objects to Observe

Mutual Event Season Heats Up at Jupiter

Jupiter is usually the one occulting and eclipsing the Galilean moons, but this observing season the moons also eclipse and occult one another.

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.

NGC 3190 group / Hickson 44

Deep Sky

Exploring Bright Galaxy Groups in Leo

Leo, the Lion, stands high in the southern sky during the early spring. We visit some of the constellation's brighter galaxy clumps then go asteroid hunting.

Battered Vesta

Celestial Objects to Observe

March — A Good Time to Visit Vesta

Dip into this easy guide to seeing the brightest asteroid, Vesta, and understanding what makes it unique.

IC 418 planetary nebula

Celestial News & Events

A Deep-sky Hippity-hop through Lepus, the Hare

Snare a dozen bright double stars and deep-sky objects in the celestial Hare the next clear night. We also provide details on how to watch the potentially hazardous asteroid Apophis occult a star the night of February 21st.

Daytime planet fest

Solar System

Planets and Comets Can't Hide from SOHO's Eye

With the help of the Solar Heliospheric Observatory you can not only keep track of the planets in the daytime sky but maybe even discover a comet.

Comet 67P/Churyumov-Gerasimenko

Comets

Comet Watch 2021

If you own an 8-inch or larger telescope you might see more than a dozen new and returning comets this year, including one potential naked-eye candidate.

Deep-sky map Capella region

Explore the Night with Bob King

Foraging for Deep-sky Delights with Capella, the Goat Star

We explore deep-sky riches within a stone's throw of Capella, one of the season's brightest stars.

Celestial News & Events

Jupiter and Saturn Embrace in Solstice Conjunction

Jupiter and Saturn fashion the Great Conjunction of 2020 when they pair up on December 21st, the winter solstice. That evening they'll be closest in nearly 400 years.

Geminids from Tenerife

Explore the Night with Bob King

A Banner Year for the Geminid Meteor Shower

With no Moon to brighten the night, this year's rich Geminid meteor shower should be one of the best ever. Find a spot away from city lights, dress warmly, and don't forget the hot chocolate.

2001 Leonid storm

Explore the Night with Bob King

Leonid Meteor Shower to the Rescue

Modest but reliable, the annual Leonid meteor shower returns this week. Take an hour or two to relax and enjoy the show.

Cool blue world

Celestial News & Events

Tiny Asteroid Flora and Mighty Uranus Team Up

Both Uranus and the asteroid 8 Flora came to opposition on Halloween. Catch them both in the same corner of the sky the next clear night.

ATLAS with a tail

Celestial Objects to Observe

Comets Crawl through the Skies at Dawn and Dusk

Comets have been scarce since NEOWISE departed the scene. Not anymore. Suddenly, there are four fresh faces visible from dusk til dawn.

Mars the magnificent

Celestial News & Events

Behold Mars! The Best View Until 2035

After a two-years hiatus Mars returns big and bright at opposition on October 13th, its best apparition until September 2035.

Caroline's Cluster

Deep Sky

Explore Caroline Herschel's Celestial Showpieces

More than 200 years ago Caroline Herschel pointed her telescope at the heavens and discovered some of the finest deep-sky objects. Follow in her footsteps and see them for yourself.

NTB via Juno

Celestial News & Events

Stormy Times on Jupiter, Comet Howell Steps Up, and More

Colder weather might be coming, but don't pack away that telescope! You'll miss a powerful storm that's remaking Jupiter's North Temperate Belt, a returning comet, Mira on the rise, and a bright supernova in the Great Bear.

Algol

Explore the Night with Bob King

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.

Advertisement
Advertisement
Advertisement
Advertisement