1–20 of 125 results
Lunar craters for timing

Observing

Gauge the Darkness and Color of the March 2026 Total Lunar Eclipse

Here’s all you need to know to help measure the size of Earth’s shadow during the next lunar eclipse.

Astronomy & Observing News

Akira Fujii (1941-2022), Photographer Par Excellence

Acclaimed astrophotographer Akira Fujii's wide-field views of the constellations, each with impeccable star images, have been a hallmark of Sky & Telescope magazine for nearly four decades.

Pocket Sky Atlas cover, Jumbo edition

Astronomy & Observing News

Here’s What’s New in the Pocket Sky Atlas, 2nd Edition

Sky & Telescope presents the second edition of its most popular celestial atlases, the Pocket Sky Atlas and the Jumbo Pocket Sky Atlas!

Creating the

Astronomy & Observing News

How We Create the "Skygazer's Almanac"

Sky & Telescope's year-at-a-glance guide to celestial happenings is a symphony of detailed calculations and clear, elegant design.

Observing

Find the Phase of the Moon

Learn the phase of the Moon tonight, the day you were born, or on any historical date.

Jumbo-Size Pocket Sky Atlas

Sky & Telescope Magazine

The Jumbo-Size Pocket Sky Atlas

Read on to find out what's new in the Jumbo edition of our popular Pocket Sky Atlas.

People, Places, and Events

Bill Bradfield, Comet Hunter Extraordinaire (1927-2014)

The prolific comet hunter William A. Bradfield tallied 18 comets in his lifetime, each discovered visually and credited to him alone.

New nova in Sagittarius

Pro-Am Collaboration

Nova in Sagittarius: Nova Sagittarii 2012 No. 4

A nova visible in good binoculars was spotted July 7, 2012, by observers in Japan.

Astronomy & Observing News

A Glitch in Time

On June 30, 2012, the world's official timekeepers will add a leap second for the first time in 3½ years.

Astronomy & Observing News

Norman Edmund, Optics Entrepreneur

His company got its start with the military surplus optics that flooded the marketplace right after World War II. Ever since, Edmund Scientific (now Edmund Optics) has inspired generations of budding astronomers.

Comet Ikeya-Murakami

Pro-Am Collaboration

New Binocular Comet in the Morning Sky

On November 3, 2010, two amateurs in Japan discovered an 8th-magnitude comet visually. It's visible in binoculars.

Astronomy & Observing News

Walt Whitman's "Meteor-Procession"

A team led by Texas State astronomer Donald W. Olson identifies a meteoric event described by Walt Whitman in Leaves of Grass with a real event the poet probably witnessed from New York City on July 20, 1860.

Celestial News & Events

Asteroid To Hide Naked-Eye Star

For anyone in a 25-mile-wide path right across Los Angeles, a bright star in Ophiuchus will wink off for several seconds in the predawn hours of April 6, 2010.

Pro-Am Collaboration

New Comet Machholz

California's comet-hunting veteran Don Machholz bagged his 11th discovery on March 23 and 26, 2010. It's a faint diffuse comet, low in the morning sky.

Pro-Am Collaboration

Nova in Eridanus

Japanese amateur Koichi Itagaki, of recent comet fame, has just discovered a nova near Rigel on November 25, 2009.

Observing

Five Amateurs Win Comet Prize

The 2009 Edgar Wilson Award honors amateur astronomers who discovered five different comets in the last 12 months, proving that backyard comet hunting still thrives in this age of automated professional sky patrols.

Pro-Am Collaboration

New Circumpolar Comet Yi-SWAN

On March 26, 2009, Korean amateur Dae-am Yi caught the small, greenish glow of a new comet with his Canon camera.

Pro-Am Collaboration

Rare Eclipse of EE Cephei Is Set to Begin

During January 2009 a faint star in Cepheus will fade, as it does every five or six years, when "something" goes in front of it.

Pro-Am Collaboration

Rock from Space to Burn Up over Africa

Late Monday night, October 6-7, 2008, a tiny asteroid will enter Earth's atmosphere over Sudan, creating a spectacular explosion in the night sky.

History and Sky Lore

New Date for Caesar's British Invasion

In 55 BC, when Julius Caesar and his fleet approached the white cliffs of Dover on the British coast, he faced unexpectedly strong tides. Researchers from Texas State University have used tidal measurements and other astronomical clues to revise the exact date of the historic landing.

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