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October 21, 2015

Close pass with 'doomsday' asteroid Apophis

The asteroid Apophis has crossed Earth's path. Now, astronomers will return to their calculators to find out what danger it poses in the future.

October 21, 2015

At far side of solar system, Voyager 1 discovers new region of space

NASA's Voyager 1 spacecraft, launched in 1977 and now the most distant human-made object from the sun, at about 11 billion miles, has entered a new region at the edge of the solar system it is close to exiting forever.

October 21, 2015

Hubble Space Telescope marks 25th anniversary in orbit this week

One of NASA's crowning glories, the Hubble Space Telescope, marks its 25th anniversary this week.

October 21, 2015

European Space Agency releases first picture from comet surface

The European Space Agency has released the first picture taken by the Philae landing probe from the surface of a comet after determining that the craft had stabilized following a tension-filled landing.聽

October 21, 2015

Could there be organic matter on Mars?

The origins of organic matter found by Mars lander missions have long been debated, but a new study suggests a way to find out whether these chemicals of life came from the Red Planet or elsewhere.

October 21, 2015

Comet landing: Scientists unsure about Philae probe鈥檚 location

The European Space Agency鈥檚 Philae lander bounced twice before finally settling on 67P/Churyumov-Gerasimenko, leaving scientists uncertain about its exact location. Settled in the shadow of a cliff, there are also fears that the probe's useful lifetime could be significantly less than anticipated.

October 21, 2015

Weak sun poses radiation risk for Mars-bound astronauts

Decreasing solar activity could make the journey to Mars and back riskier for astronauts, a new study warns.

October 21, 2015

Three fireballs lit up US skies Monday, but one might be fake

Three brilliant fireballs - two from space and one apparently made by humans - lit up skies over the U.S. on Monday, prompting hundreds of reports by surprised skywatchers.

October 21, 2015

How a total lunar eclipse saved Christopher Columbus

Monday marks Columbus Day for people in the United States, but did you know there was a lunar twist to the famous explorer's journey?

October 21, 2015

Saturn's weird fast-changing ring baffles scientists

One of Saturn's iconic rings looks much different today than it did just a few decades ago, and scientists aren't sure why.