Ocean world near Saturn top contender for life beyond Earth

A tiny, ice-encrusted ocean world orbiting Saturn is now a hotter-than-ever candidate for potential life.

NASA's Cassini spacecraft has detected hydrogen molecules in the geysers shooting off the moon Enceladus, possibly the result of deep-sea chemical reactions between water and rock that could spark microbial life, scientists announced Thursday.

NASA and others are quick to point out this latest discovery does not mean there's life on Enceladus (ehn-SEHL'-uh-duhs), but that there may be conditions favorable for life.

7 Earth-size worlds found orbiting star; could hold life

For the first time, astronomers have discovered seven Earth-size planets orbiting a single nearby star — and these new worlds could hold life.

This cluster of planets is less than 40 light-years away in the constellation Aquarius, according to NASA and the Belgian-led research team who announced the discovery Wednesday.

Gene Cernan, last astronaut to walk on the moon, dies at 82

Former astronaut Gene Cernan, who as the last person to walk on the moon returned to Earth with a message of "peace and hope for all mankind," died on Monday, his family said. He was 82.

Cernan was with his relatives when he died at a Houston hospital following ongoing heath issues, family spokeswoman Melissa Wren told The Associated Press. His family said his devotion to lunar exploration never waned.

"Even at the age of 82, Gene was passionate about sharing his desire to see the continued human exploration of space and encouraged our nation's leaders and young people to not let him remain the last man to walk on the Moon," his family said in a statement released by NASA.

Astronaut Edgar Mitchell, 6th man on moon, dies in Florida

Apollo 14 astronaut Edgar Mitchell, who became the sixth man on the moon when he and Alan Shepard helped NASA recover from Apollo 13's "successful failure" and later devoted his life to exploring physics, the mind, and unexplained phenomena such as psychics and aliens, has died in Florida. He was 85.

Mitchell died Thursday night at a West Palm Beach hospice after a short illness, his daughter, Kimberly Mitchell, said. Mitchell's passing coincides with the 45th anniversary of the Apollo 14 mission from Jan. 31-Feb. 9, 1971.

Life on Mars? NASA says planet appears to have flowing water

Mars appears to have flowing rivulets of water, at least in the summer, scientists reported Monday in a finding that boosts the odds of life on the red planet.

"Mars is not the dry, arid planet that we thought of in the past," said Jim Green, director of planetary science for NASA.