A huge galactic smash-up may have formed the galaxies nearest us.
Astronomers say a black hole recently formed in a nearby galaxy.
A NASA lunar probe reveals that the Moon stores more ice at its poles than previously thought.
Scientists are reproducing supernova explosions on computer screens.
NASA's newest infrared space telescope is revealing the unseen Universe.
A new Hubble Space Telescope image shows a galaxy with a complex identity.
A local star is the most massive ever detected.
Scientists chart new asteroid territory in order to understand the early Solar System.
A rock collected by the Apollo 17 mission in 1972 yields a surprise.
The Swift satellite, NASA's high-energy detector, is studying black hole mysteries.
In a nebula packed with stars, not all stay with the crowd.
Asteroids may have delivered water to early Earth.
State-of-the-art spacecraft observes our Sun with unprecedented detail.
Satellites go wide, then zoom in on galactic dust.
Zoom from the Himalayas to the edge of the observable Universe—and back again.
Ancient quartz crystals reveal our young planet's magnetic field.
Astronomers get a fresh perspective on the Orion Nebula.
What's stretching space at an ever-faster pace?
Hubble is watching seasons change on the dwarf planet.
Hubble captures the most distant, ancient galaxies ever seen.
AMNH astronomers have revealed a long-hidden star in the Big Dipper's handle.
NASA's new infrared telescope is set to reveal thousands of space objects.
Can scientists trace the source of this space radiation?
With a telescope this big, the future is bright for South African astronomy.
Forty-year-old lunar samples contain trace amounts of water.
The innermost planet like we’ve never seen it before.
How scientists are solving the mystery of the Universe's most powerful explosions.
Learn the origins of our Moon.
A revolutionary set of star-seeking telescopes is taking precision to the next level.
Pluto in 2015...or bust.
What does it take to plot a Universe's worth of space objects?
The Milky Way and Andromeda Galaxy are on a collision course.
Most asteroids and comets don't pass anywhere near Earth. Most.
After a seven-year trip, the Cassini spacecraft arrived at Saturn in July 2004.
To what lengths do scientists have to go to snare a gravitational wave?
Water once flowed on Mars—perhaps enough to harbor life.
Two technologies to find and describe faraway planets.
The Universe's oldest light is cosmologists' window to the past.
Earth is increasingly vulnerable to the power of solar storms.