-90 degrees Fahrenheit: Minimum air temperature Baumgartner’s specially-designed pressurized spacesuit can withstand.
-10 degrees Fahrenheit: Air temperature predicted 23 miles up as Baumgartner steps out of his capsule.
Less than 1%: Air pressure at the altitude of Baumgartner’s jump, as a percentage of that at sea level.
55 stories: Height of the 30-million-cubic-foot helium balloon that will hoist Baumgartner and his 2,900-pound protective capsule into space.
2: Number of practice runs before Tuesday’s record-breaking attempt. His first practice fall was from 71,000 feet in March 2012, and his second was from 97,000 feet in July.
3: Number of cameras attached to Baumgartner’s suit to record his descent. He’ll have one on each thigh and one on his chest pack.
5: Number of records Baumgartner’s jump will break if successful. He’s aiming to be the first human to ever break the sound barrier in free-fall and to claim the records for highest free-fall altitude, highest manned balloon flight and longest free-fall. His jump platform is believed to be the largest manned balloon in history.
5 minutes and 35 seconds: Amount of time Baumgartner is expected to free-fall.
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