21–40 of 442 results
Proxima Centauri flare

Meet the Stars

Meet Proxima Centauri: The Closest Star

Proxima Centauri is the dimmest and smallest of the Alpha Centauri system, but it has the honor of being the nearest star.

Galaxies in Cetus

Celestial Objects to Observe

Deep-sky Fishing in Cetus, the Whale

Small telescopes can reel in some big ones in the constellation Cetus, the Whale.

Lunar craters for timing

Eclipses

Useful Projects for a Lunar Eclipse

Here's all you need to know to help us measure the size of Earth's shadow during the total lunar eclipses in 2022.

Earth and Uranus compared

Explore the Night with Bob King

Uranus Queues Up for Opposition

Journey to a remote planet then double back to check in on the latest stirrings of Comet 29P/Schwassmann-Wachmann before touching the finger of dawn.

Aurora over a lodge

Auroras

How to Photograph the Northern Lights

Follow these tips to help capture auroral displays.

International Observe the Moon Night 2021

People, Places, and Events

International Observe the Moon Night 2021

Join fellow lunar enthusiasts all over the world in celebrating the Moon this weekend.

Explore the Night with Bob King

How Bright Will Comet Leonard Get?

We examine circumstances and expectations for the current apparition of Comet Leonard, which may become the year's brightest comet.

Conflagration, Expansion and Fade

Celestial News & Events

Comet 29P Undergoes Brightest Outburst in Recent Years

Catch one of the most active small bodies in the solar system during a rare superoutburst.

Cassiopeia open clusters map

Explore the Night with Bob King

Cassiopeia Cornucopia — Pretty Little Clusters All in a Row

See nine unique open clusters in Cassiopeia while barely moving your telescope.

Comet 4P/Faye and tail

Comets

Making Time for Morning Comets

If you like mixing comets with the quietude of observing in the small hours, September opens with five fuzzy vagabonds just waiting for a visit.

Gamma Cassiopeia

Meet the Stars

Meet Gamma Cassiopeiae, the Classic Eruptive Variable

Gamma Cassiopeia may lack a proper name, but the middle star of the "W"-shape constellation is worth finding on the sky.

Jupiter, Ganymede, Europa and double shadows, March 25, 2019

Planets

The 12-Year Cycle of Jupiter Oppositions

Jupiter is at opposition on August 19th. If we take the long view — 12 years long — we can watch Jupiter's oppositions as it passes through the zodiac constellations.

History and Sky Lore

It’s the Blue Moon . . . the “True” Blue Moon!

If skies are clear this weekend, you'll see the full Moon. And not just any old full Moon, but the Blue Moon . . . the "true" Blue Moon!

RS Oph animation

Celestial News & Events

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

Doubles map east

Explore the Night with Bob King

Dazzling Double Stars for Compromised Skies

For many, smoke from wildfires has transformed summer nights, blotting out stars and familiar deep-sky sights. But through it all double stars keep on shining.

Deep Sky

Night at the (Celestial) Museum

Take some time to explore the overlooked masterpiece of Messier 56.

NGC 5453 globular cluster

Night Sky Sights

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.

Temple of the Moon

Eclipses

Plan Ahead for the 2023 Annular Solar Eclipse — and a Visit to Dark Sky Parks

If today’s solar eclipse has you wondering when the next one will cross the continent, start planning now for a stellar trip around October 14, 2023.

M56 globular

Night Sky Sights

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

Celestial Objects to Observe

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.

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