The number of planets we have found orbiting other stars has snowballed in recent years, thanks to discoveries by the Kepler spacecraft. Now, NASA's next missions toward understanding the Milky Way's abundant worlds are preparing for launch.
NASA's top scientist says she thinks evidence of life beyond Earth will turn up in the next couple of decades. Why so optimistic? Scientists have been discovering liquid water all around the solar system, and even though life on other planets might look different than it does here on Earth, scientists bet liquid water will be essential.
A total lunar eclipse, also known as a "blood moon," will be visible from the Bay Area early Saturday morning.
NASA's MESSENGER spacecraft is soon to end its 10-year mission in a fiery touchdown on the surface of the planet Mercury--but not before giving us our most up-close look yet at this little understood and elusive world.
It turns out our solar system is weird: it doesn't have any rocky "super-Earths" orbiting closer to the sun than Mercury. Here's one theory as to why: like Miley Cyrus, Jupiter came in like a wrecking ball and smashed any nascent terrestrial planets just as the solar system was forming.
Far beneath the icy crust of Saturn's small moon Enceladus, hydrothermal activity may be at work, activity similar to what is found in some life-friendly environments on Earth.
Space exploration has suffered its share of setbacks and disappointments over the decades, but few of them stung as much as the 2013 mechanical failure of the Kepler spacecraft, a space telescope designed to accomplish one of the most exciting explorations of space ever: the search for potentially Earth-like planets orbiting other stars.
On March 6, NASA's Dawn spacecraft will become our first encounter with a dwarf planet when it arrives at Ceres.
The large asteroid Vesta has added flows of material rich in water to its bag of tricks. It's just one more way this small world acts like a proper planet.
Only 84 years after its discovery in 1930 by Clyde Tombaugh, it is the eve of our first-ever close-up look at everyone’s favorite dwarf planet, Pluto. NASA’s New Horizons spacecraft will make a fly-by on July 14th, after a high-speed, nine-year voyage.
After several months of analysis of Comet 67P/Churyumov-Gerasimenko, the European Space Agency's Rosetta spacecraft has yielded some intriguing, and maybe, unexpected results. The data is refueling a long-running debate in the scientific community about a matter closer to home: the origin of Earth's oceans.
Humans have been sending messages into outer space for decades, hoping some intelligent extra-terrestrial might come upon them. Now, for the first time in history, we have addresses. So, what should we say?
NASA announced that Mars' Gale Crater was once the site of a vast lake that appears to have filled up, dried out and filled up again repeatedly over a much longer period than wet conditions were believed to have persisted.
NASA reports successful test of new craft designed for deep space mission.
Ten years after arriving at Saturn, NASA's Cassini spacecraft is still able to send us delightful surprises from a billion miles away. Most recently, it cruised by the large moon Titan and caught a flash of sunlight reflecting off the liquid surface of one of the moon's hydrocarbon seas, Kraken Mare.
Philae made a thud, bounced, and hasn't been seen since by the Rosetta mother ship.
If you want to go to Mars but can’t quite afford the hundreds of billions of dollars for a ticket, there is another solution: consider instead a trip to the Atacama Desert in Chile.
Yesterday morning, the European Space Agency's (ESA) Rosetta spacecraft successfully launched the landing probe, Philae, to a landing on the surface of comet 67P/Churyumov-Gerasimenko, a historic first.
After 10 years of travel and three months orbiting the comet 67p/Churyumov-Gerasimenko, the European Space Agency's (ESA) Rosetta spacecraft is poised to deliver its landing probe, Philae, to the comet's surface -- a first in history.