12 August, 2018
"Fly baby girl, fly!" project scientist Nicola Fox of Johns Hopkins University said in a tweet right before liftoff.
Running 24 hours late because of a last-minute countdown glitch Saturday, the trek began at 3:31 a.m. EDT (GMT-4) Sunday when the 233-foot-tall Delta's three hydrogen-fueled Aerojet-Rocketdyne RS-68A main engines ignited with a rush of brilliant orange flame and quickly throttled up to 2.1 million pounds of thrust.
"The unique requirements of this mission made the Delta IV Heavy the ideal launch vehicle to deliver Parker Solar Probe into orbit with the highest precision", said Gary Wentz, ULA vice president of Government and Commercial Programs.
It is travelling on board the Delta-IV Heavy rocket, which will hurl the probe into the inner Solar System.
The unprecedented sun-skimming probe that lifted off today from the U.S. is set to study the "solar winds" proposed in the paper by Dr Eugene Newman Parker, who has now become the first living scientist to have mission named after him. The extreme pull of the sun's gravity will then accelerate the probe up to insane speeds of as much as 430,000 miles per hour (700,000 km/h) as it grazes the edge of the most powerful object in our corner of the galaxy. Parker watched the launch at Cape Canaveral and said it was his first time seeing a rocket blast off in person. NASA chief of the science mission directorate, Thomas Zurbuchen, said Parker is an "incredible hero of our scientific community".
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It is said the data gathered by the car-sized probe will "revolutionise" our understanding of the star, which has a huge impact on Earth.
The probe will reach tremendous speeds as it orbits the sun. It is the first NASA mission to be named for a living researcher.
Zurbuchen considers the sun the most important star in our universe - it's ours, after all - and so this is one of NASA's big-time strategic missions.
One of the reasons, scientists are sending the probe is the Sun's atmosphere and the weird property it exhibits, of being hotter than the surface of the sun itself.
It is said to endure unprecedented levels of heat, and radiation 500 times greater than that experienced on Earth.
More than 1 million names are aboard the spacecraft, submitted last spring by space enthusiasts, as well as photos of Parker, the man, and a copy of his 1958 landmark paper on solar wind.