41–60 of 240 results

Space Missions

Is a New Moon News?

Thanks to the latest find by the Cassini spacecraft, we now know that Saturn has 60 satellites circling it.

Space Missions

The End of the Rovers?

The dust clouds on Mars are blocking out so much sunlight that the Mars Exploration Rovers may not survive until the storm blows over.

Solar System

Ice Volcanoes Everywhere?

Pluto's largest moon, Charon, might be the latest solar system body with active geysers on its surface.

Solar System

The Walnut-Shaped Moon

Scientists now think they know why Saturn's moon Iapetus has its distinctive nutty character.

Celestial News & Events

Spotty Weather

There's a cool sunspot group visible right now. If the weather is clear, go grab a safe solar viewer and check it out for yourself.

Solar System

Mars Pole Bound — Again

NASA is set to launch its latest Mars mission, the Phoenix lander, as early as August 3rd.

Solar System

Return of the Sponge Moon

Back in 2005 we reported why Hyperion had a sponge-like appearance. Turns out that our old story is dead wrong!

Solar System

What a Difference a Decade Makes

It's been a decade since Mars Pathfinder touched the surface of Mars and heralded a new era of Martian exploration.

People, Places, and Events

Diving into the Blogosphere

Starting today we're going to be doing things a little differently here at SkyandTelescope.com. Check out the changes!

New Product Showcase

Observing Wear

Thermal underwear from Scope Armor will keep you warm while observing in even the harshest conditions.

New Product Showcase

Affordable Oculars

Two new eyepieces from SmartAstronomy offer wide, flat fields of view at comfortable prices.

New Product Showcase

Bob's Lightbridge Knobs

The latest innovation from Bob’s Knobs is a set of tool-free collimation knobs for Meade’s LightBridge telescopes.

Orion Telescopes & Bionculars

New Product Showcase

Big Mak

Orion Telescopes & Binoculars adds to its Maksutov-Cassegrain line with a new 180-millimeter Mak.

New Product Showcase

Fast RC Series

RC Optical Systems announces a new series of fast, affordable Ritchey-Chrétien telescopes that can fully illuminate the biggest imaging detectors on the market today.

New Product Showcase

Master Meade's AutoStar

Pick up new tricks and become an AutoStar master with MaxFactory’s new Stars at a Click: Master AutoStar CD-ROM.

Equipment: Guides & Recommendations

S&T Test Report: A Modernized Classic

S&T: Gary Seronik Parks Optical combines a newly designed altazimuth mount with tried-and-true Newtonian optics. Inside the August issue of Sky & Telescope. On newsstands June 26th!

Fallen trees near the Tunguska River in Siberia

Astronomy & Observing News

Has a Tunguska Crater Been Found?

Italian researchers think they've found a hole in the Siberian forest where an extraterrestrial rock famously slammed to Earth 99 years ago.

Astronomy & Observing News

It's Official: Eris Outweighs Pluto

By examining the orbit of Eris's moon, a team of researchers has concluded that Eris is significantly more massive than Pluto.

Calendar of

Press Releases

"Blue Moon" to Rise on May 31st

On Thursday, May 31st, a full Moon will rise for the second time this month (the first time was on May 2nd). Many people call the second full Moon in a calendar month a "blue Moon." Yet the definition is wrong!


Saturn Plays Hide and Seek

Planetary occultations are among nature's most majestic celestial scenes. One look at an image like this and it's easy to see why.