SUNSET: 
How Type-Ia Supernovae Work: The Movie
You thought an exploding star would be simple? Hah.
Examining the Throat of a Black-Hole Jet
How do black holes squirt away jets of matter at nearly the speed of light? Now we know!
Polaris's Pulsations Pick Up
The North Star, slightly variable in brightness, continues to confound expectations.
Sky at a Glance | April 25th, 2008
The bright Mars-Pollux-Castor triangle, high in the west, is now flattening out to be more of a curved line than a triangle. Watch it change shape daily. High in the south, Saturn and Regulus are now paired their closest. And Jupiter shines before dawn.
Hubble's Colliding Galaxies
No two galaxy collisions are alike, as shown in 59 weird images just released by the Hubble Heritage Project.
VISTA Survey Nears the Starting Line
A giant telescope with a deeply curved mirror is on its way to revolutionizing our view of the infrared sky.
Sky at a Glance | April 18th, 2008
The eyecatcher of the evening sky is the Saturn-Regulus pair high in the south. Or maybe you'd give that award to the Mars-Pollux-Castor triangle high in the west. And using both of these bright sights, do you know how to find the Head of Hydra?
Sky at a Glance | April 11th, 2008
Saturn and Regulus form an ever closer pair high in the evening sky, while Gamma Leonis looks on from their north. The Moon joins the scene on Monday and Tuesday. Meanwhile, Jupiter glares off by its lonesome before dawn.
The First Type-Y Star?
It's the coolest brown dwarf yet, and it seems to be in a spectral class of its own.
Sky at a Glance | April 4th, 2008
The Moon meets the Pleiades on Tuesday the 8th. Saturn shines with Regulus in an eye-catching pair all month. And when can you last see Venus low in the dawn?
A Raft of New Planets in Silhouette
The SuperWASP project finds 10 new extrasolar planets crossing the faces of their stars.
Sky at a Glance | March 28th, 2008
Have you compared the colors of Mars and Betelgeuse? They're one above the other just now. Meanwhile Saturn shines with Regulus in an eye-catching pair, and Jupiter and the waning Moon light the dawn. Also, don't miss out on this week's Space Station flyovers.
A Record-Breaking Gamma-Ray Burst
The visible-light glow of a gamma-ray burst briefly shone at magnitude 5.4, despite its distance of 7.5 billion light-years — more than halfway across the visible universe.
Sky at a Glance | March 21st, 2008
The Big Dipper now dumps into the Little Dipper in the north after dark. Saturn and Regulus shine ever higher and closer together in the southeast to south. And with spring now here, trace out the starry constellation patterns of the pipe-smoking Herdsman and the grain-sowing Maiden.
Sky at a Glance | March 14th, 2008
The waxing Moon in the evening sky passes Mars and then the Saturn-Regulus pair this week. Meanwhile, Venus and Mercury are tightly paired very low in the dawn.
Sky at a Glance | March 7th, 2008
The waxing crescent Moon marches up past the Pleiades and Hyades to reach first quarter toward the end of the week. Saturn closes in on Regulus. And Arcturus rises to signal the approach of spring.
A Cloudy Comet and a Wispy Nebula
Comet Holmes is greatly dimmed from its glory days last fall, but this week it's passing the photogenic California Nebula.
Four Martian Landslides Caught in the Act
A scarp along the edge of the Martian north polar cap is more active than anyone expected.
Sky at a Glance | February 29th, 2008
Saturn is in fine view just past opposition. This is the best time of year for seeing the zodiacal light. And Venus pairs up with Mercury low in the dawn.
