Next stop, Mars.
NASAâs Mars Science Laboratory and the Curiosity rover are preparing to enter the Martian atmosphere, following an 8 ½ month race to the red planet at 8,000 miles per hour. By the time it arrives at Mars, gravity will have accelerated the spacecraft to a whopping 13,200 mph.
NASA must then slow it down.
Following âseven minutes of terrorâ beginning at 1:31a.m. EST early Monday morning â" a reference to the nerve-racking landing NASA has planned, which involves Curiosityâs screaming race to the surface and a dangle off a rocket-powered sky crane â" the rover will be set to begin its mission: the study of our planetary neighbor, and the quest for signs of life there.
âCuriosity is the culmination of a decade of exploration. We can now begin to move toward finding the fingerprints of life on Mars,â said Scott Hubbard, a Stanford University consulting professor of aeronautics and astronautics.
The space agency said Curiosity remains in good health, and was steering so smoothly between planets that a planned minor course correction Saturday wasnât necessary. And with the gravitational pull of Mars already tugging on the spaceship, arrival is being closely monitored by the watchful eyes of mission control.
âAfter flying more than eight months and 350 million miles since launch, the Mars Science Laboratory spacecraft is now right on target to fly through the eye of the needle that is our target at the top of the Mars atmosphere,â said Mission Manager Arthur Amador of NASAâs Jet Propulsion Laboratory, Pasadena, Calif.
In keeping with a decades-old tradition, peanuts will be passed around the mission control room at the NASA Jet Propulsion Laboratory for good luck. The space agency said it was optimistic that everything would go according to plan.
"Can we do this? Yeah, I think we can do this. I'm confident," Doug McCuistion, head of the Mars exploration program at NASA headquarters, said Saturday. "We have the A-plus team on this. They've done everything possible to ensure success, but that risk still exists."
A Twitter feed for the rover itself happily chirped notice Saturday evening of its imminent arrival at Mars.
âRight now, I'm closer to Mars than the moon is to Earth,â the robot craft wrote.
Earlier in the week, a dust storm swirling to the south of the landing site gave the team some pause. Ashwin Vasavada, the mission's deputy project scientist and Mars weather forecaster, said the storm basically went "poof" and posed no threat â" but the agency continues to monitor it nonetheless.
"Mars appears to be cooperating very nicely with us. We expect good weather for landing Sunday night," he said.
The distance between the planets remains a stubborn challenge to mission control; due to the signal time lag between Mars and Earth (it takes about 14 minutes for a signal on Mars to zip to Earth), Curiosity will execute the landing autonomously, following the half a million lines of computer code designed by Earthlings.
Curiosity will not be communicating directly with Earth as it lands, because Earth will set beneath the Martian horizon from Curiosityâs perspective about two minutes before the landing.
That spotty communication during landing could delay confirmation for several hours or even days, NASA said. And the rover wonât immediately begin beaming back mind-blowing pictures of Mars.
The first Mars pictures expected from Curiosity are reduced-resolution fisheye black-and-white images received either in the first few minutes after touchdown or more than two hours later. Higher resolution and color images from other cameras could come later in the first week. Plans call for Curiosity to deploy a directional antenna on the first day after landing and raise the camera mast on the second day.
Indeed, the first image we receive may come from a different spacecraft entirely.
Through a remarkable combination of engineering and mathematics, a crew will attempt to precisely position a second satellite â" maneuvering it to just the spot around the giant planet to capture the split second when Curiosity falls from the skies.
âWeâre only making one attempt on [Mars Science Laboratory] here,â Christian Schaller of NASAâs High-Resolution Imaging Science Experiment (HiRISE) team told Universe Today. âThe plan is to capture MSL during the parachute phase of descent.â
Curiosityâs journey to Mars hasnât been without incident. NASA said the craft has been acting as a stunt double for astronauts who might someday follow in its wake, exposing itself to the same cosmic radiation humans would experience following the route to Mars.
âCuriosity has been hit by five major flares and solar particle events in the Earth-Mars expanse,â said Don Hassler of the Southwest Research Institute in Boulder, Colorado. âThe rover is safe, and it has been beaming back invaluable data.â
The Associated Press contributed to this report.
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