SUNSET: 
Lightning on Venus
The world next door seemed hellish enough with an atmosphere 90 times the sea-level pressure on Earth and surface temperature of 900°. Now, scientists say, there's lots of lightning — and what little water it has seems to be escaping to space.
Earth at Night: Not a Pretty Sight
Rosetta's nighttime snapshots of the Eastern Hemisphere show that the fight against light pollution has a long way to go.
Call for Images of Venus
Venus Express project scientists are inviting amateur and professional astronomers to contribute Earth-based images of the planet made at infrared, visible, and ultraviolet wavelengths.
Good Morning Earth
The Kaguya spacecraft provides a nice way to start the day with a look back home.
Rosetta Attacks!
Briefly mistaken for an asteroid headed toward Earth, a European-built comet chaser zips by en route to its deep-space rendezvous.
China Reaches the Moon
A Chinese spacecraft named Chang'e 1 is preparing to study the Moon at close range after successfully settling into lunar orbit.
The Record Stellar-Mass Black Hole
In a nearby galaxy, astronomers find the biggest-ever small black hole.
Seeing More Red
A new series about going to Mars premieres this week. But that's just the beginning of your multimedia adventure.
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?
Titan's Frigid Shores
NASA's Cassini orbiter continues mapping Saturn's largest moon — and finding prime lakefront real estate.
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.
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.
There Might Be Supergiants
A new view from the Hubble Space Telescope reveals the goings on in a cluster full of massive stars.
Follow that Station!
Our renewed online tool will let you follow humans orbiting Earth.
Refining Hipparcos's Star Distances
To extract even better star distances, a Cambridge astronomer who took part in the Hipparcos mission has just completed a whole new analysis of the raw data.
Sun 1, Comet Tail 0
A solar explosion plows into a comet's tail. Care to place a wager on which one wins?
Hi-Def from Space
A Moon-bound spacecraft looks back to shoot Earth in high-definition glory.
Skylights into Martian Caves
NASA's Mars Odyssey orbiter may have found deep black pits — possibly sinkholes — that act as skylights for extensive caves on the slopes of the volcano Arsia Mons.
