4741–4760 of 6,041 results

Solar System

Prepare to Be Blown Away by Iapetus

Cassini finally encounters Saturn's wacky moon Iapetus today. Don't wait for the processed pics to be released. Check out the raw images now!

Pro-Am Collaboration

Surprise Outburst of a New Dwarf Nova

A suspected dwarf nova is undergoing its first observed outburst and had reached 9th magnitude as of September 5, 2007. More observations are needed.

Astronomy and Society

Great Offer, Great Cause

Until November 1st, astronomy-club members can join the International Dark-Sky Association and help fight light pollution for about the cost of a large, three-topping pizza — and the IDA is better for you!

Solar System

The Source of the Dinosaurs' Asteroid

Did a colossal collision in the asteroid belt 160 million years ago doom the dinosaurs? A just-published analysis argues strongly for exactly that.

Celestial News & Events

Aurigids Aplenty!

Just as predicted, the Aurigid shower delivered a burst of meteors created by particles shed by a comet more than 2,000 years ago.

Milky Way

Measuring Neutron Stars Exactly

Astronomers can measure a neutron star's diameter by effects of gas skimming around its surface at 40% of light speed.

Solar System

The Sun's Hot Corona: Mystery Deepens

Why is the Sun's atmosphere so hot? Physicists thought they knew the answer — powerful waves of energy moving up from the solar surface — but now they're not so sure.

Sky Tour Astronomy Podcast

Listen to Our September Podcast

This month's podcast explores how there still plenty of summer's stars to view even as we transition to autumn.

Astronomy and Society

A Starry Chemical Imbalance

New high-resolution images of dwarf galaxy IC 10 in Cassiopeia may help resolve an enduring mystery about this star-forming powerhouse.

Solar System

The Sun Shakes the Earth

A team of scientists makes a compelling case that sound waves rattling around inside the Sun are literally shaking Earth's interior.

People, Places, and Events

High (School) Honors

The Astronomical League has presented its National Young Astronomer and Jack Horkheimer awards for 2007.

Cosmology

A Whole Lotta Nothing

If you're looking for a place to really get away from it all, head toward a lovely spot in southeastern Eridanus.

Celestial News & Events

Vesta Visits Jupiter

The brightest asteroid swings by the King of Planets from August 28th to the 31st.

Solar System

Mars Rovers Rolling Again!

Predictions that the twin Martian explorers wouldn't survive the dust storm thankfully proved to be wrong. Spirit and Opportunity are back in business.

Celestial News & Events

A Particularly Dark Full Moon

Tuesday morning's total lunar eclipse made for a stunningly dark, beautiful sight.

Pro-Am Collaboration

Map the Moon During Tomorrow's Lunar Eclipse

Please help us accurately map the edge of the Moon by timing occultations of stars during the August 28, 2007, total lunar eclipse.

Cosmology

Whole Lot of Nothing

A billion light-year-wide "hole" in space is a very cold and empty place.

Professional Telescopes

Rings of Uranus on Edge

For the first time since the rings of Uranus were discovered, astronomers are studying their edge-on view.

Celestial News & Events

Earth To Hit Aurigid Meteors

Western skywatchers are hoping to see a display of bright meteors on the morning of September 1st, as the Aurigid meteor shower is predicted to make a strong but brief showing.

Space Missions

Icy Shower Poses No Threat for Cassini

Scientists are confident that the towering ice geysers on Saturn's moon Enceladus shouldn't harm the Cassini spacecraft during a close flyby next March.