NASA's Curiosity Mars rover faces a terrifying seven-minute plunge through the Red Planet's atmosphere using a first-of-its-kind landing system involving a supersonic parachute and a 'sky-crane' that will lower the rover to the Martian surface.

Day by day, hour by hour, the tension is building. NASAs mega-mission to Mars and delivery of the Curiosity rover could be a smashing success or just smashing.

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The Mars Science Laboratorys 1-ton Curiosity rover is factory-equipped with science gear to delve into whether Mars ever was or might be today an eco-friendly setting able to sustain microbial life.

A seven-minute, terrorizing plunge through the planets atmosphere awaits the spacecraft. MSLs Curiosity rover is scheduled to touch down at Gale Crater at 10:30 p.m. PDT on Aug. 5 (1:30 a.m. EDT, 0530 GMT, Aug. 6).

At that moment, NASAs Mars Reconnaissance Orbiter is to attempt imaging the final seconds of the robot's death-defying high dive.

"We will indeed be imaging the spot MSL is predicted to be about 60 seconds prior to landing, but the odds of capturing it are estimated at 60 percent," said Alfred McEwen at the University of Arizona in Tucson. He is principal investigator of the orbiter's super-powerful High Resolution Imaging Science Experiment (HiRISE). [Mars Rover Curiosity's Daring Landing in Pictures]

"The chips are really down on this one," said Robert Zubrin, president of the Mars Society, which is dedicated to the human exploration and settlement of Mars.

"If it succeeds, it will be far and away the best Mars mission ever. It will make extraordinary scientific discoveries and fire the public's imagination with the vision of exploring another world," he told SPACE.com.

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