1,191 results

Astronomy & Observing News

Threatening Asteroid Aids Planetary Prognosticators

Asteroid 1950 DA may have a 1-in-300 of hitting Earth in 2880, and in deriving those odds dynamicists have learned much about all the factors that affect those long odds.

Astronomy & Observing News

Radar Reveals Big Splash on Mercury

Using Arecibo's powerful radar system, astronomers have identified what may be one of the solar system's youngest craters on the Sun-scorched plains of Mercury.

Astronomy & Observing News

New Probe of Yucatán Crater Ends

The Chicxulub impact crater is buried beneath roughly 1,000 meters of sediment (vertical scale is exaggerated). The Yaxcopoil-1 drilling effort intended to sample a variety of rocks resulting from the impact itself.Courtesy David A. Kring. It's been 11 years since geologists pinpointed the location of a huge impact that, most…

Astronomy & Observing News

Scientists Track "Recent" Flood on Mars

Mars may be bone-dry today, but new observations suggests that floodwaters may have raged across its surface within the past 10 million years.

Astronomy & Observing News

Testbed Paves Way for Amateur Space Telescope

Members of the ISS-AT (Interantional Space Station Amateur Telescope) team pose with their 'Alpha' telescope and its control computer during inaugural tests on February 2nd. From left: Richard Berry (kneeling), Tom Melsheimer, Matt Bisque, Orville Brettman, Terry Mann, Lance Martin, and Sean Sheldon.Courtesy Richard Berry. Amateur astronomers dream of someday…

Astronomy & Observing News

Galileo Mission Winds Down

Even though its main communication antenna never deployed, NASA's Galileo spacecraft has been productive — and durable — ever since entering orbit around Jupiter in December 1995. Multiple flybys of the Jovian moon Io have subjected the spacecraft to more than 500,000 rads of magnetospheric charged particles — 3½ times…

Occultations

A Saturn-Moon Spectacle

There will be other occultations of Saturn this year — but none with February's prime-time appeal for North American observers.

Juno's irrgular shape

Asteroids

Juno Goes It Alone

Glimpsing Juno during the first half of 2002 will be a challenge.

Astronomy & Observing News

Huge Ice Deposits Found on Mars

A NASA spacecraft has strong evidence that slabs of ice lie buried just below of huge portions of the Martian surface.

Astronomy & Observing News

Will Leonids "Storm" for North America?

A 'meteor's-eye view' shows how Earth will be oriented for the first expected peak of the Leonid shower on November 18, 2001, at about 5 a.m. EST (2 a.m. PST). That's when dynamicists predict that Earth will encounter the most dense region of particles released by Comet Tempel-Tuttle. While the…

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