The International Astronomical Union formally named two small moons of Pluto discovered last year.

"You will believe a man can fly," the old movie posters proclaimed. Well, not quite. But you may be surprised at how rooted in fact the Man of Steel's abilities are.

Related Photos: Animals With "Superman Powers"

Animal-rescue workers in California were surprised at what they saw when they x-rayed an ailing mallard: an "alien" hiding in the bird's gut.

We're not in "I'm sorry, Dave" territory yet, but NASA is giving unmanned spacecraft decision-making software that may take them one step closer to HAL 9000.

Armed with the latest satellite data, scientists are on the verge of giving space-based warnings for two of humanity's deadliest disasters.

Sunlight reflected from Earth onto the moon may hold clues to global warming and help locate Earth-like planets, scientists say.

Astronomers say they have found a distant solar system containing three rocky, medium-size planets—one of which could have water on its surface.

As light pollution worsens across the United States, astronomers are urging citizens adopt dark-skies policies that would limit the amount of light shining upward.

Scientists say they may have solved the mystery of one of the solar system's most peculiar objects, the giant moon Triton in orbit around Neptune

To Mars and back in 90 days? The technology that propelled the starship Enterprise may be on its way, according to a controversial claim.

Two satellites launched this morning are the final components of the biggest space observatory ever built: a chain of orbiters dubbed the A-Train.

If cars were as fuel efficient as supermassive black holes, researchers say, the vehicles could theoretically travel over a billion miles (1.6 billion kilometers) on a gallon of gasoline.

NASA celebrated the Hubble Space Telescope's 16th birthday with the release a brilliant new image captured by the orbiting observer.

After years of radio silence, extraterrestrial-seekers will soon be looking as well as listening, thanks to a first-of-its-kind observatory.

Mars was once wet, many scientists say. Now it's dry. For the first time, a geological map of the entire planet is revealing the history of its dessication.