SUNSET: 
Comet Holmes Undergoes Huge Outburst
On Wednesday, October 24, 2007, this faint comet between the orbits of Mars and Jupiter suddenly became a naked-eye "star."
Lonely Planets of the Cosmos
If an Earth-Moon system was flung out of its solar system, could life still survive there? Possibly yes.
Meteor Showers on Mars
Scientists now know what meteor showers occur in the rarefied atmosphere above Mars. So how come NASA's intrepid rovers can't see them?
Predicting Planets
Finding new planets around distant stars has become commonplace. But now a team of astronomers has succeeded in predicting the orbit of a planet that hadn't yet been discovered. The last time that happened was more than 150 years ago.
Automated Lunar Impacts
NASA is watching the Moon to see how often it gets hit by meteoroids.
Aurora Stamps Have Appeal
The US Postal Service has just rolled out an attractive pair of stamps that feature photos of the northern and southern lights.
Just Don't Call It West Coast NEAF
Here's some great news for those of you on the West Coast. The Riverside Telescope Makers Conference, Inc. — the same folks who bring us the world-famous RTMC Astronomy Expo every Memorial Day weekend in Big Bear, California — has announced a new astronomical event.
Amateurs Spot Transiting Exoplanet
Using modest gear and a lot of skill, amateur astronomers catch a record-breaking planet crossing the face of its star 250 light-years away.
Pluto's New Family Portrait
Years of painstaking observation with some of the world's most powerful telescopes are finally showing us a glimpse of what awaits New Horizons when it reaches Pluto in 2015.
Titan's Frigid Shores
NASA's Cassini orbiter continues mapping Saturn's largest moon — and finding prime lakefront real estate.
50 Years of Satellite Tracking
Today marks the 50th anniversary of the first calculated orbit of an artificial satellite. Sky & Telescope readers helped make it happen.
Two Planets, One Discovery
Talk about serendipity! Two teams of scientists on opposite sides of the Atlantic, studying two planets on opposite sides of Earth, come up with the same quirky result.
Spotlight on New Horizons
Jupiter looks great through a backyard telescope, but can you imagine how much better it'd look from just 1.4 million miles away? NASA's Pluto-bound spacecraft got that chance last February.
Iapetus Yields Dark Secrets
Saturn's black-and-white moon has mystified astronomers for centuries. Finally, however, they're learning what a bizarre place it truly is.
Imaging Mercury
A team of astronomers have found new features on the innermost planet using an approach familiar to many amateur astronomers.
Kaguya: To the Moon!
With a brief rocket firing on October 4th, the Japanese spacecraft Kaguya slipped into lunar orbit — the first step in what promises to be an exciting scientific mission.
Students To Go Pulsar Hunting
High-school students in West Virginia will sift through data from one of the world's largest radio telescopes to look for pulsars. Astronomers expect that they will find dozens.
Dunlap Observatory, RIP
The University of Toronto has announced that the David Dunlap Observatory, situated north of Toronto, Ontario, and the home of Canada's largest optical telescope, is to be closed and sold.
See the International Space Station Tonight!
The world's largest orbiting satellite is a snap to spot if you know where and when to look for it.
Site Picked for Giant Magellan Telescope
Another truly monster telescope of the future has just taken a step closer to reality.
