NASA launches the Mars Global Surveyor.

NASA's Pathfinder space probe lands on the surface of Mars.

NASA's Mars Global Surveyor reaches Mars.

NASA announces that it has lost contact with the Mars Climate Orbiter.

NASA loses radio contact with the Mars Polar Lander moments before the spacecraft enters the Martian atmosphere.

NASA launches into orbit the Terra platform carrying five Earth Observation instruments, including ASTER, CERES, MISR, MODIS and MOPITT.

NASA's Galileo spacecraft passes within 112 miles of Jupiter's moon Io.

NASA's Mars Odyssey space probe begins to map the surface of Mars using its thermal emission imaging system.

The last successful telemetry from the NASA space probe Pioneer 10.

The Spirit Rover is launched, beginning NASA's Mars Exploration Rover mission.

Spirit, a NASA Mars Rover, lands successfully on Mars at 04:35 UTC.

NASA's MER-A (the Mars Rover ''Spirit'') ceases communication with mission control. The problem lies in the management of its flash memory and is fixed remotely from Earth on February 6.

NASA's unmanned spacecraft ''Genesis'' crash-lands when its parachute fails to open.

Space Shuttle program: STS-114 Mission – Launch of ''Discovery'', NASA's first scheduled flight mission after the ''Columbia'' Disaster in 2003.

STS-114: NASA grounds the Space Shuttle, pending an investigation of the continuing problem with the shedding of foam insulation from the external fuel tank. During ascent, the external tank of the Space Shuttle Discovery sheds a piece of foam slightly smaller than the piece that caused the Space Shuttle Columbia disaster; this foam does not strike the spacecraft.

The New Horizons probe is launched by NASA on the first mission to Pluto.

NASA reveals photographs taken by Mars Global Surveyor suggesting the presence of liquid water on Mars.

Johnson Space Center Shooting: A man with a handgun barricades himself in NASA's Johnson Space Center in Houston, Texas before killing a male hostage and himself.

NASA's Phoenix spaceship is launched.

First lunar impact of the Centaur and LCROSS spacecrafts as part of NASA's Lunar Precursor Robotic Program.