Mars Rover’s Nerve-Wracking Landing Just Hours Away.

After 8 1/2 months crossing the millions of miles between planets, the biggest and most complex rover ever sent to another world is now on its final approach for a hair-raising touchdown on Mars.

NASA’s 1-ton Curiosity rover is set to land inside the Red Planet’s Gale Crater at 10:31 p.m. PDT tonight (Aug. 5; 1:31 a.m. EDT and 0531 GMT on Aug. 6). As with any planetary landing, success is not a given, and tensions may be especially high tonight given Curiosity’s elaborate, unprecedented landing sequence.