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Space History Facts

-An Astronaut can be up to 2 inches taller returning from space. The cartilage disks in the spine expand in the absence of gravity.

- The surface speed record on the moon is 10.56 miles per hour. It was set with the lunar rover.

- The Hubble Space Telescope weighs 12 tons (10,896 kilograms), is 43 feet (13.1 meters) long, and cost $2.1 billion to build.

- Today, the solar cells we use to power calculators, highway emergency phones, and satellites can convert over 25 percent of the sunlight that hits them into useful energy.

- The hottest planet in the solar system is Venus, with an estimated surface temperature of 864 F (462 C).