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Celestial News & Events

Mars: The Show Continues

Mars will remain a fiery yellow-orange beacon in the evening sky during the first half of September and will shrink and fade only a little until well into October.

Celestial News & Events

Solar Flare Again Spawns an Aurora

For the second time in the last few days, a powerful flare on the Sun triggered an unusual display of the aurora borealis over some of the world's midlatitudes.

Astronomy & Observing News

Meeting the Solar System's Final Frontier

This artist's concept shows structures in the tenuous gas where the expanding solar wind meets the interstellar medium far beyond Pluto. Voyager 1 has apparently crossed the first boundary layer, as described in the text. Voyager 2 still has a way to go.Courtesy NASA / Walt Feimer. NASA's farthest-ranging spacecraft…

Astronomy & Observing News

Black Hole "Sound" Heats a Galaxy Cluster

Bubbling blobs send powerful, super-deep sound waves rippling through a galaxy cluster's hot gas.

Astronomy & Observing News

Mars's Dazzling Sky Show

Late in August the planet Mars passes closer to Earth than it has been in nearly 60,000 years — and the red planet has become a fiery yellow-orange beacon in the evening sky.

Astronomy & Observing News

Scrutinizing Supernovae

Astronomers uncover new clues about what happens in the crucial Type Ia variety of exploding star.

Astronomy & Observing News

The Oldest, Weirdest Planet

It orbits not just one star, but two. And it's almost as old as the universe itself.

Astronomy & Observing News

Keck Interferometer Measures a Future Solar System

In a technological tour de force, the two giant Keck telescopes combine light waves for super-sharp resolution of the disk around a young star.

Astronomy & Observing News

Arizona Scopes Escape Wildfire

Intense firefighting efforts have saved the many telescopes of Steward Observatory northeast of Tucson.

Astronomy & Observing News

NASA To Launch Glowing Night Clouds

NASA will release three luminous clouds into the night sky over the Eastern Seaboard as early as tonight.

Astronomy & Observing News

Delta Scorpii Still Showing Off

For the fourth summer in a row, a special star near Antares is shining abnormally bright.

Astronomy & Observing News

News from the Sun

Solar astronomers meeting this week have announced a spate of new research results about our home star.

Astronomy & Observing News

A New Neighbor Star

Astronomers turn up a faint red dwarf just a few light-years from the solar system.

Astronomy & Observing News

Views of the Pale Blue Dot

NASA's Mars Global Surveyor has become the latest spacecraft to image the Earth-Moon pair from afar.

Astronomy & Observing News

The Deepest Photo Ever Taken

The Hubble telescope's newest and best camera has broken the record for imaging the faintest stars and galaxies.

Astronomy & Observing News

Titan's Surface: Mostly Ice, Not Goo

Saturn's large, haze-shrouded moon is covered mostly with dirty ice rather than exotic hydrocarbons, according to the best spectral evidence yet.

Astronomy & Observing News

Astro Image in the News:
A Spectacular Light Echo

An erupting star in Monoceros spreads its light across surrounding gas and dust.

Astronomy & Observing News

How Bright Was History's Brightest Supernova?

The dazzling supernova of the year 1006 amazed the medieval world. Now astronomers have pinned down its distance and brightness.

Astronomy & Observing News

Catching Ancient Stardust

Tiny grains blown off from stars that existed before the solar system formed are sifting down all around us.

Astronomy & Observing News

Mapping the Big Bang

Results from NASA's MAP satellite strengthen the new cosmology.

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