Here's all you need to know to help us measure the size of Earth's shadow on Jan. 31, 2018.
Sky & Telescope's year-at-a-glance guide to celestial happenings is a symphony of detailed calculations and clear, elegant design.
Learn the phase of the Moon tonight, the day you were born, or on any historical date.
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The prolific comet hunter William A. Bradfield tallied 18 comets in his lifetime, each discovered visually and credited to him alone.
In France, one of the giants of telescope making has died. He shared his years of professional experience with amateurs around the world.
A nova visible in good binoculars was spotted July 7, 2012, by observers in Japan.
On June 30, 2012, the world's official timekeepers will add a leap second for the first time in 3½ years.
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.
On November 3, 2010, two amateurs in Japan discovered an 8th-magnitude comet visually. It's visible in binoculars.
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.
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.
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.
Japanese amateur Koichi Itagaki, of recent comet fame, has just discovered a nova near Rigel on November 25, 2009.
The world of amateur telescope making has lost a charismatic optical engineer and innovator at age 82. One of the "big guns" of yesteryear, John Gregory introduced the Gregory-Maksutov telescope design, giving basement mirror makers a high-end alternative to, well, just mirrors.
The Leonid meteor shower peaks near new Moon in 2009, making this a fine year for any meteor lover. Observers in the Americas are ideally placed for the traditional peak, and a brief, unusually intense burst is forecast for Asia.
The world won't end on December 21, 2012, but you're probably already getting lots of questions about it.
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.
The coral-ringed islet of Ouba in Kiribati (the Gilbert Islands) is less than a kilometer in circumference and about the remotest corner of Earth from which one could witness the total solar eclipse on July 22, 2009. A select group from Ring of Fire Expeditions did just that.
On March 26, 2009, Korean amateur Dae-am Yi caught the small, greenish glow of a new comet with his Canon camera.
Comet Lulin is nearest and brightest this week, and it's in a dark, moonless sky. Use our exclusive sky chart to find it with binoculars or a telescope!
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.
As November ends, Jupiter and Venus perform a dazzling dance in the evening twilight — and they're joined by a slender crescent Moon on December 1st.
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.
FOR IMMEDIATE RELEASE Contacts: Donald W. Olson, Department of Physics, Texas State University 512-245-2131, firstname.lastname@example.org Roger W. Sinnott, Senior Editor, Sky & Telescope 617-864-7360 x2146, rsinnott@SkyandTelescope.com Cambridge, MA, June 30, 2008 Researchers from Texas State University have revised the date when Julius Caesar invaded Britain in 55 BC, a transformational event in world history.…