On August 12,2018 Parker Solar Probe,NASA robotic spacecraft,began its seven year journey to probe the outer corona of the Sun.Earlier,it was named Solar probe plus and later it was renamed Parker Solar Probe in the honor of American Astrophysicist Eugene Newman Parker.The project costs $1.5 billion.
Parker Solar Probe will be the first spacecraft to fly into the low solar corona.The spacecraft's systems are protected from the extreme heat and radiation near the Sun by a solar shield.The shield is hexagonal,mounted on the Sun-facing side of the spacecraft,11.4cm thick,and is made of reinforced carbon-carbon composite,which is designed to withstand tempratures outside the spacecraft of about 1,370°C.If the shield were not between the spacecraft and the Sun,the probe would be damaged and become inoperative within tens of seconds!
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