NASA's first mission to Pluto will begin sending images to Earth early next year.
Unless you're enough of an lunar fanatic to wake up at 3 a.m., a total eclipse of the moon will occur while you are sleeping tomorrow morning.
If you rise any time before dawn, go outside for a look.
The Nicaragua explosion claim was intriguing to asteroid watchers.
NASA funds five proposals for far-out projects and two are based in Tucson.
"Boy, they really flew by wire," Astronaut John Glenn quipped as he checks over the control wires of the full scale model of the Wright Brothers first powered aircraft, Dec. 17, 1963, Kitty Hawk, N.C. The model was presented at ceremonies in observance of the 69th Anniversary of powered flig…
A Tucson teen was selected to attend a space camp in Huntsville, Alabama.
For the second time ever, an astronomer saw an asteroid headed for Earth before it got here.
The NASA asteroid-sample return mission being led by the UA's Lunar and Planetary Lab is less than three years away.
The treasurer of the nonprofit Xerocraft Hackerspace, Jeremy Briddle, was excited about the group’s planned move into the old Steinfeld Warehouse downtown from its cramped space in South Tucson.
The sun's activity is well below historical levels and could be headed even lower.
NASA scientist Larry Lasher feels a bit left out when people talk about Voyager 1 being on the verge of leaving the solar system.
The Space Shuttle Challenger is seen as it lifts off the pad on its aborted mission in Kennedy Space Center, Florida, Jan. 28, 1986. Seen at the bottom section of the solid rocket booster, just to the right of the right wing of Challenger, a black plume of smoke can be seen. Investigators be…
Pictured here is the Halloween festival in Anaheim, Calif., Oct. 20, 1962. Nearly everyone turns out to watch the parade, and thousands are on hand to watch the show that launches it at the Palma Stadium. Another 7,000 or more school children take part in a youngsters' parade and there is br…
Apollo 11 astronauts Neil Armstrong, Michael Collins and Edwin Aldrin Jr. appeared in a cheerful mood as they left the Manned Spacecraft Operations Building to enter the transfer van that takes them to Pad 39 where they will enter their spacecraft looking forward to a moon landing, July 16, …
Astronaut Neil Armstrong in space suit in 1969. (AP Photo)
The Cassini-Huygens spacecraft revealed a series of geysers, or jets, near the south polar region of Enceladus, a Saturn moon.
HiRise has done it again - this time, capturing a photo of the NASA rover Curiosity payload descending toward the surface of Mars beneath its parachute.
Ham, also known as Ham the Chimp, was the first higher primate launched into outer space on January 31, 1961. Ham is shown on the deck of the rescue ship after his capsule splashed down in the Atlantic Ocean on January 31. Ham's journey started when he was secured in a Project Mercury capsul…