5581–5600 of 6,087 results

Astronomy & Observing News

Mysteries of the North Star

Polaris is not only a variable star, its variations are varying. And no one quite knows why.

Astronomy & Observing News

Asteroids "Sunburn" with Age

A new study shows that the longer some asteroids are exposed to space, the redder their surfaces become.

Celestial News & Events

Bradfield's 18th Comet

Indefatigable comet hunter William Bradfield has found another (his 18th); it's currently visible low in the northeast before sunrise.

Celestial News & Events

The Double Comet Show of 2004

Comets NEAT and LINEAR may reach modest naked-eye brightness in April and May.

Astronomy & Observing News

Chandra Probes Dark Energy

New X-ray observations have independently confirmed that the universe is dominated by dark energy.

Astronomy & Observing News

Did an Impact Trigger the "Great Dying"?

Geoscientists think they've found the site of a giant impact off the Australian coast that nearly wiped out life on Earth 251 million years ago.

Astronomy & Observing News

Young Astronomers Honored

John Davis is seen here with one of his custom-machined German equatorial telescope mounts. Davis won the top prize for the Astronomical League's 2004 National Young Astronomer Award.Courtesy Astronomical League. Each year since 1993 the Astronomical League has recognized outstanding astronomy achievements by US high-school students through its National Young…

Astronomy & Observing News

Possible New Milky Way Spiral Arm

Radio astronomers may have identified a fifth spiral arm in the outer reaches of our galaxy.

Astronomy & Observing News

SuperWASP Scrutinizes Swarms of Stars

In a hunt for extrasolar planets, hundreds of thousands of the brightest stars are getting measured precisely many times per night.

Celestial News & Events

The Moon Goes Dark

Europe and Africa are prime viewing areas for the total eclipse of the Moon on May 4—5.

Astronomy & Observing News Astro Image in the News:
Hubble's Anniversary Ring"}'>

Astro Image in the News:
Hubble's Anniversary Ring

The Hubble Space Telescope celebrates 14 years in orbit with a stunning view of a galaxy torn asunder.

Astronomy & Observing News

Astro Image in the News:
Triple Shadow Transit Movie

A California amateur shot a remarkable sequence recording last March's triple shadow transit on Jupiter.

Astronomy & Observing News

Mars Rovers Rockin' and Rollin'

One NASA rover sets a distance record while the other heads for the hills.

Astronomy & Observing News

Hubble Study Gets Under Way

The US National Academy of Sciences has assembled a stellar committee of experts to weigh options for extending the life of the Hubble Space Telescope.

Astronomy & Observing News

Astro News Briefs: April 12–18

Mars Rover Missions Extended April 12, 2004 | On April 5th the rover Spirit celebrated its 90th day on Martian terrain. On April 26th Opportunity will do the same. These birthdays are particularly poignant as they represent the end of the rovers' primary missions. Due to the missions' tremendous success,…

Astronomy & Observing News

For Many Amateurs, NEAF is a Rite of Spring

A record number of attendees came to Suffern, New York, on April 17–18 to the Northeast Astronomy Forum & Telescope Show.

Celestial News & Events

One Planet, Two Moons, Three Shadows

This coming weekend, weather permitting, almost anyone with a telescope in North America (and northwestern South America) can see the shadows of three Jovian moons at once.

Celestial News & Events

One Planet, One Moon, and Three Shadows

Clouds and poor seeing plagued much of North America on the night of March 27–28, 2004, but some observers still managed to see the remarkable triple shadow transit on Jupiter.

Astronomy & Observing News

Gravity Probe B Puts General Relativity to the Test

Gravity Probe B should measure the warp of space due to the geodetic effect as 6.6144 arcseconds of drift in the gyroscropes' spin direction, and only 0.0409 arcsecond due to the frame-dragging effect.Courtesy NASA/MSFC. It took nearly 90 years of theory, 40 years of engineering, and 10 years of lobbying…