Space
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Planetary Science
Making Mercury
New computer simulations of Mercury's violent formation account for the planet's abundance of heavy elements and also reveal that some of the debris generated by the collision could have found its way to Earth and Venus.
By Ron Cowen -
Astronomy
Ring around the Pulsar: Planets may form in a harsh environment
Astronomers have found a disk that has the potential to make planets in the harsh environment surrounding the ultradense remains of an exploded star.
By Ron Cowen -
Planetary Science
Another red spot, by Jove
Jupiter has developed a second red spot, which is now visible in the predawn sky with a telescope 10 inches or larger.
By Ron Cowen -
Astronomy
Twin history
The Milky Way and its nearest large galactic neighbor, Andromeda, are more alike than earlier evidence had indicated.
By Ron Cowen -
Planetary Science
Propelling Evidence: Cassini finds clues to source of Saturn’s rings
Four propeller-shaped gaps in one of Saturn's main rings are the latest evidence that a shattered moon produced the planet's dazzling hoops.
By Ron Cowen -
Astronomy
Comet Sampler: Fire meets ice
The first study of comet dust brought to Earth by a spacecraft has revealed several minerals that could have formed only at the fiery temperatures close to the sun or another star.
By Ron Cowen -
Astronomy
Glassy galaxies
Astronomers have found clouds of sand crystals resembling crushed glass around 21 infrared-bright galaxies.
By Ron Cowen -
Astronomy
Cosmic Triumph: Satellite confirms birth theory of universe
The most detailed portrait ever taken of the radiation left over from the Big Bang provides fresh evidence that the universe began with a tremendous growth spurt, expanding from subatomic scales to the size of a grapefruit in less than a trillionth of a second.
By Ron Cowen -
Astronomy
Magnetic Memory: New model forecasts solar storms
A new computer model predicts that the next solar-activity cycle won't begin until late 2008, a year later than the sun's standard cycle would forecast.
By Ron Cowen -
Planetary Science
Pluto’s posse
Images taken by the Hubble Space Telescope on Feb. 15 confirm that Pluto has two small, previously unknown moons.
By Ron Cowen -
Astronomy
Peeling Back Orion’s Layers
By studying the most detailed portrait ever assembled of the Orion nebula, astronomers hope to glean new insights about star birth throughout the galaxy.
By Ron Cowen -
Astronomy
Unique Explosion: Gamma-ray burst leads astronomers to supernova
Astronomers have found a supernova associated with the second-closest-known gamma-ray burst, confirming a model in which bursts arise from material blasted into space by a supernova explosion.
By Ron Cowen