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- Planetary Science
What whacked the inner solar system?
Planetary scientists have determined that the cavalcade of space debris that hammered the inner solar system for the first 700 million years of its existence were main-belt asteroids, not comets.
- Planetary Science
Roving on the Red Planet
Scientists review the discoveries made by the Mars rovers after nearly 18 months on the Red Planet.
- Planetary Science
The Whole Enceladus
Saturn's moon Enceladus has become the hottest new place to look for life in the chilly outer solar system.
- Planetary Science
Icy world found inside asteroid
New observations of Ceres, the largest known asteroid, hint that frozen water may account for as much as 25 percent of its interior.
- Planetary Science
NASA postpones plans for Mars samples
Still reeling from the failure of its two most recent missions to Mars, NASA announced late last month that it would delay by nearly a decade plans to bring back samples from the Red Planet.
- Health & Medicine
The Zero Gravity Diet
Living in space punishes the body as much as smoking a pack of cigarettes a day, says a new study of astronaut health and nutrition.
- Tech
Tracing the origin of Genesis’ crash
The upside-down installation of four switches intended to signal the Genesis spacecraft to open its parachutes is the likely cause of the craft's crash in the Utah desert on Sept. 8.
- Astronomy
Deep Impact
Data from the Deep Impact mission reveal that the bullet that slammed into Comet Tempel 1 on July 4 excavated material that likely hadn't seen the light of day since the birth of the solar system 4.5 billion years ago.
- Planetary Science
A World Unveiled: Crème brûlée on Titan
Penetrating the orange haze of a frigid, alien world, a space probe parachuted onto Saturn's moon Titan and unexpectedly came face-to-face with terrain that looks a lot like Earth.
- Humans
Science News of the Year 2006
A review of important scientific achievements reported in Science News during the year 2006.
- Planetary Science
Rovers in overtime
NASA has extended the missions of the twin Mars rovers by 5 months, through September 2004.
- Tech
Sound power for deep-space travel beyond sun’s reach
An unusually efficient new type of power unit for spacecraft uses sound to convert heat to electricity.
