Simulating the conditions on Venus is also a tall order, but scientists are attempting it with the Extreme Environment Test Chamber, at NASA's Glenn Research Center in Cleveland, Ohio. This beast can simulate the mind-boggling conditions on the surface of Venus: it is able to create pressures of 1,350 pounds per square inch--90 times Earth's air pressure at sea level--and temperatures of 1,000 degrees Fahrenheit. This device can also subject test devices to lethal gases like hydrogen fluoride, sulfur dioxide, and hydrogen chloride, all of which exist in Venus' atmosphere and to which future probes will be exposed. This is definitely one planet where astronauts won't be landing anytime soon.