Europe already has a major mission en route to Jupiter's orbit - the Rosetta mission, which will chase down a comet and put a lander on its surface.
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Ideally, say advocates of such a mission, Apophis' orbit would need to be changed before 2025 to be sure it misses the Earth.
More like a mission to low Earth orbit.
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He and his two crew mates explained that NASA originally planned for their mission to stay in earth's orbit, like all previous missions.
This is a best-practice time-limit adopted by the world's space agencies for the removal of their equipment from orbit once it has completed its mission.
He joined Nasa in 1980 and is a veteran of four space shuttle flights, commanding the mission that launched the Hubble Space Telescope into orbit in 1990.
Her role in the mission will be to run the medical experiments in orbit.
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Including his latest mission, he has spent 553 cumulative days in orbit, the fifth highest total in history.
The current space mission is Chris Hadfield's third trip into orbit.
The 13-tonne mission was initially lifted into a 350km-high orbit above Earth, with the expectation that the probe's big engine would fire twice - first, to raise that orbit, and, second, to set course for Mars.
In previous missions in Earth orbit, you lost a lot of the mission time because you could not observe when the Earth itself was shining in the telescope.
"We were really happy to take part in delivering Expedition Three to orbit and they're having a great mission right now up there on the space station, " Horowitz told reporters after inspecting Discovery with fellow shuttle crewmembers Rick Sturckow, Dan Barry and Pat Forrester.
If true, the mission represents a major step towards the nation putting human astronauts into orbit.
And an optical mission to test laser relay capabilities from earth geosynchronous (GEO) orbit will soon follow.
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Though Curiosity's primary science mission has yet to begin, the rover, along with probes in orbit, already have transmitted images.
On 18 August, the week before the loss of the space station mission, a Proton vehicle failed to put a communications satellite in its proper orbit.
On 18 August, the week before the loss of the space station mission, a Proton rocket failed to put a communications satellite in its proper orbit.
The need for the fuel-saving orbit was the result of a technical problem early on in the mission (it was originally intended to arrive in 1999).
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OTV-1 launched in April 2010 and spent 224 days in orbit before going through the refurbishment process prior to being prepped for this mission, he said.
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It took 60 hours to get to the Moon so we waited until the craft was in orbit and then we had a mad rush to get from Launch Control to Mission Control (in Houston, Texas).
Some space experts have said that any manned Mars mission using existing rockets probably would need to have a capsule dock with some type of booster in orbit.
"After a good flight of the solid boosters and core cryogenic stage, there was a problem with the upper stage and the desired orbit was not attained, " Arianespace Chairman and CEO Jean-Marie Luton announced after the mission.
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