Scientists have discovered a new planet they call a "super-Earth" in a solar system 9,000 light-years away.

His name has become synonymous with genius, but you don't have to be a physics whiz to understand Albert Einstein, whose birthday is March 14, and his legacy. Learn the basics of Einstein's theories and why they continue to shape the way we think about the universe.

After a seven-month journey, a NASA spacecraft successfully made orbit around the red planet today to the relief of Mission Control.

Spouting like Old Faithful, the moon Enceladus may have liquid water inside its icy crust, a NASA craft reveals.

A new report shows that Antarctica has been losing ice rapidly—the equivalent of about 40 trillion gallons (151 trillion liters) of water a year. Learn what this big melt may mean for the future.

Look out, Great Red Spot. A brash young contender may be aiming for your title of Solar System's Most Powerful Storm.

Power grids, GPS systems, and astronauts could be in for a turbulent next 12 years. Scientists predict the next solar storm cycle will be especially intense.

Watch as NASA helps uncover an ancient jungle complex using high-tech satellites.

Rumors of twins have been swirling around a certain heavenly body lately (hint: we're not talking about Angelina Jolie). Now the truth can be revealed.

A thousand times more powerful than those on Earth, lightning bolts are striking the ringed planet during gargantuan storms imaged by a NASA spacecraft.

A multinational team of astronomers has discovered an entirely new kind of cosmic object—a Rotating Radio Transient, or RRAT—that is likely related to pulsars.

Scientists could be a step closer to understanding the properties of dark matter, the mysterious substance that holds our galaxy together.

"I wish we hadn't had to do it," said NASA's administrator in response to criticism of the plan to redirect funds from scientific exploration to human spaceflight.

Did comets spark life on Earth? New findings from NASA's Deep Impact spacecraft are adding to the debate.

Tomorrow astronauts on the International Space Station will jettison one of the most unusual satellites ever launched: a stuffed spacesuit.