Astronomy
- Astronomy
A comet’s odd orbit hints at hidden planet
Far beyond the solar system's nine known planets, a body as massive as Mars may once have been part of our planetary system, and it might still be there.
- Astronomy
A Dark Force in the Universe
Cosmologists are thinking dark thoughts about what kind of mystery force may be contorting the cosmos, pushing galaxies apart at a faster and faster rate.
- Astronomy
Starry Data Support Revved-Up Cosmos
Astronomers have confirmed one of the weirdest properties of the universe: Some mysterious force is pushing galaxies apart at a faster and faster rate.
- Astronomy
Some of galaxy’s dark matter comes to light
A new study adds to the evidence that astronomers have unveiled some of the dark matter in our galaxy and that it's pretty ordinary stuff—white dwarfs, the cold, compact embers of low-mass stars.
- Astronomy
Creating a warmer, wetter Mars
A new study adds to the evidence that past volcanic activity could have temporarily created a warmer, wetter Mars, a place on which water once flowed freely.
- Astronomy
Magnetic flip heralds solar max
Scientists have found another indicator that the sun has reached the maximum of its current activity cycle: The polarity of its magnetic field has reversed.
- Astronomy
In moon race, Saturn is still champ
New discoveries have raised the retinue of Saturn's known moons to 30, making the ringed planet the solar system's champ.
- Astronomy
Mining the Sky
A proposed national virtual observatory, a mammoth computer database integrating spectra, images, and other information covering the entire sky, could usher in a new age of discovery in astronomy.
- Astronomy
Cassini at Jupiter: Eyeing the Io torus
The Cassini spacecraft has captured the most detailed images ever taken of the Io torus, a doughnut-shaped ring of charged particles that surrounds Jupiter and is replenished by the planet's moon Io.
- Astronomy
Ancient Mars water: A deep source?
A new analysis of a Mars meteorite that fell to Earth suggests that much of the water believed to have once flowed on the surface of the Red Planet came from eruptions of molten rock that originated deep within the planet.
- Astronomy
Distant cluster suggests low-weight cosmos
Lured by the radio beacon of a faraway galaxy, astronomers have discovered the most distant cluster of galaxies known in the universe.
- Astronomy
Old stars reveal universe’s minimum age
Using a technique more precise than ever before, an international team of researchers has estimated the age of the universe to be at least 12.5 billion years old.
