Scientists also hope the probe can help them to answer why the corona, the outermost layer of the sun's atmosphere, is 300 times hotter than its surface.
The car-sized spacecraft will be launched from Florida's Cape Canaveral on Saturday at around 3:50 am eastern standard time. "It gives me the sense of excitement of an explorer". It is expected to approach the sun in 2024. "In addition to using a powerful rocket, the Delta IV Heavy, Parker Solar Probe will perform seven Venus gravity assists over its seven-year mission to shed sideways speed into Venus' well of orbital energy". It's the fastest any man-made object will have ever traveled and the probe will likely hold that title for a long time.
"We'll be going where no spacecraft has dared go before - within the corona of a star", project scientist Nicky Fox said in a statement. The $1.5 billion mission will revolutionize our understanding of the sun.
"With each orbit, we'll be seeing new regions of the sun's atmosphere and learning things about stellar mechanics that we've wanted to explore for decades".More news: Juventus and Real Madrid battle to sign Sergej Milinkovic-Savic
Earth, and all the other objects in the Solar System are constantly plowing through what is known as the solar wind - a constant stream of high-energy particles, mostly protons and electrons, hurled into space by The Sun.
"As we send spacecraft and astronauts further and further from home, we must understand this space environment just as early seafarers needed to understand the ocean". The spacecraft and its suite of delicate instruments will be protected from the sun's extreme heat by a carbon fiber heat shield.
Nasa says the TPS has been tested to withstand up to 1,650C temperatures and "can handle any heat the sun can send its way".