NASA mission controllers have not heard from the Mars Exploration Rover Spirit since March 22, and the rover is facing its toughest challenge yet – trying to survive the harsh Martian winter.

NASA selected Orbital Sciences Corp.'s, Technical Services Division in Greenbelt, Md., for the agency's Sounding Rockets Operations contract.

NASA managers will discuss an upcoming spacewalk at the International Space Station during a news briefing at 1 p.m. CDT on Tuesday, Aug. 3.

NASA is inviting the public to choose an area in northern Arizona where explorers will conduct part of the annual Desert Research and Technology Studies, known as Desert RATS.

NASA personnel are among a group of international researchers who are in the Canadian Arctic assessing concepts for future planetary exploration as part of the Haughton-Mars Project, or HMP-2010.

The number of languages used on the International Space Station has recently increased.

A camera aboard NASA's Mars Odyssey spacecraft has helped develop the most accurate global Martian map ever. Researchers and the public can access the map via several websites and explore and survey the entire surface of the Red Planet.

NASA is offering undergraduate students an opportunity to test an experiment in weightless science as part of the agency's Reduced Gravity Education Flight Program.

Astronomers using NASA's Spitzer Space Telescope have discovered carbon molecules, known as "buckyballs," in space for the first time. Buckyballs are soccer-ball-shaped molecules that were first observed in a laboratory 25 years ago.

NASA's Hubble Space Telescope has detected a hypervelocity star – a rare phenomenon moving three times faster than our sun.