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Venus is the hottest planet in our solar system. The surface temperature on Venus is a burning 461.85 °C (863.33 °F). On Pluto it is so cold that liquid nitrogen turns to solid! Pluto's estimated surface temperature is around -228°C (-378°F).
The first man in space boarded the Russian spacecraft Vostok 1 in April 12, 1961 with a 50-50 chance of survival. The spacecraft orbited the earth for one hour and 48 minutes and returned successfully.
The "Solar Challenger" is a solar powered plane that was built in 1980 with the ability to fly using only the energy provided by sun. It's longest flight was 160 miles (260km), completed without the use of any batteries.