Launch of first-ever mission to 'touch' Sun pushed to Sunday
NASA has postponed the launch of Parker Solar Probe by a day to Sunday, the first-ever mission aimed to enter the Sun's corona (outer atmosphere). The 7-year mission would probe why temperatures in corona reach a million ÂºC while Sun's visible surface below it reach only 5,500ÂºC. The $1.5-billion spacecraft will reach within 6.1 million km of the Sun's surface.