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Sky Tour Astronomy Podcast

Tour August's Evening Sky in 2006

Download this MP3 file to your iPod or other handheld device, and you'll be guided to Jupiter, the constellation Scorpius, the Milky Way, and more! You'll also get tips on when and how to watch the Perseid meteor shower. (5.5MB file; hosted by Kelly Beatty, editor of Night Sky magazine.)

Celestial News & Events

Tour July's Evening Sky In 2006

Track down dazzling Jupiter and the trio of bright stars that comprise the Summer Triangle. (4MB MP3 file; hosted by Kelly Beatty, editor of Night Sky magazine.)

Antikythera Mechanism

Astronomy & Observing News

A Millennium Ahead of Its Time

An international team of scientists has found that an ancient Greek astronomical computer is far more complex than scholars had realized.

Ceres in cutaway

Solar System

Ceres: The Wet Look

Mounting evidence suggests that the largest asteroid is hiding a large cache of water ice beneath its surface.

Astronomy & Observing News

Plethora of Puffy Planets

Astronomers have confirmed 14 exoplanets that transit their host stars. All of these worlds orbit their suns at very close distances, and thus are heated to high temperatures. Strangely, however, a bevy of these bodies are much less massive than they should be. Astronomers are trying to find out why.

Planets at Dawn

Celestial News & Events

Mercury and Mars at Dawn

Rise and shine! Fleeting Mercury will be highest above the southeastern horizon Sunday morning — your best chance to see it until February. It joins Mars in a predawn appearance.

Astronomy & Observing News

Hubble Confirms a Cosmic Jerk

Astronomers have confirmed the presence of dark energy in the universe 9 billion years ago by imaging a slew of galaxies before and after supernovae exploded.

Celestial News & Events

Comet SWAN Still Glows After Dusk

Comet SWAN remains a nice but fading target for telescopes in early evening. Follow it using our chart.

Astronomy & Observing News

Titan: Assembling the Puzzle

Since it arrived at the ringed planet, NASA's Cassini orbiter has flown past Saturn's cloud-enshrouded moon Titan nearly two dozen times. And with each encounter, scientists come closer to piecing together the complex story of the Saturnian system's largest satellite.

People, Places, and Events

Beautiful Universe 2007 Photo Contest Winners

Out of the hundreds of entries sent to Sky & Telescope, the following represent the best of the best. Click through to see the first-, second-, and third-place winners in each of our nine categories — as well as each of the Readers' Choice Award winners. And a special congratulations…

Astronomy & Observing News

Mercury Transit Observed

Strategically placed sunspots ushered Mercury onto and off the Sun's disk on Wednesday, November 8th.

Astronomy & Observing News

SOHO Comet No. 1,200 Discovered

On October 10th, less than eight months after the 1,100th comet was found in images obtained by the SOHO (Solar and Heliospheric Observatory) spacecraft, No. 1,200 was discovered by Bo Zhou.

Astronomy & Observing News

More Halloween Treats from NASA

On Tuesday NASA officials funded concept studies for six missions: a return to Deep Impact's Comet Tempel 1, an asteroid sample-return mission, a visit to Venus, and more.

Hubble Servicing

Astronomy & Observing News

A Happy Halloween for Hubble

NASA administrator Michael Griffin today gave the Hubble Space Telescope a new lease on life by announcing that astronauts will visit the observatory in 2008 to make repairs and upgrades.

Astronomy & Observing News

A Thousand Martian Sunsets

Surviving long past its expected life span, NASA's Mars Exploration Rover Spirit marks its 1,000th day on the Red Planet.

Astronomy & Observing News

A Planet that Runs Hot and Cold

In a "seminal result" astronomers using NASA's infrared Spitzer Space Telescope have made the first measurement of the difference between an extrasolar planet's daytime and nighttime temperatures.

Astronomy & Observing News

Spring Has Sprung on Uranus

A new dark spot has appeared in the atmosphere of Uranus, which is experiencing an extended spring.

Astronomy & Observing News

A Curiouser and Curiouser KBO

To date astronomers have found more than 1,000 Kuiper Belt objects (KBOs) beyond Neptune. The strangest one of all may have fathered a whole KBO family.

Astronomy & Observing News

Mauna Kea Earthquake Update

The telescopes atop Hawaii's tallest peak were shaken by Sunday's 6.6-magnitude temblor, but appear to have survived relatively unscathed.

SOFIA in Hangar

Astronomy & Observing News

From Ugly Duckling to Beautiful Swan

The Stratospheric Observatory for Infrared Astronomy, a telescope-toting 747SP airliner, has received a fresh coat of paint in preparation for its first test flight.