NASA aims to launch its historic subcompact spacecraft on Sunday to touch the Sun from the Cape Canaveral Air Force Station in Florida the scheduled start on Saturday was scrubbed. NASA called the reason for the delay of the start as "violation of a start limit".
"The launch of a United States launch Alliance Delta IV heavy launcher, which carried the Parker Solar Probe, was canceled today for violation of a start limit." There was not enough time to stay in the window to recycle The scheduled start time on Sunday is 3:31
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The probe is named after Eugene Parker, a solar physicist who first predicted the existence of the solar wind in 1958 and magnetic fields that flow continuously from the sun.
On a United Delta Alliance Launch Delta IV Heavy – one of the world's most powerful rockets – with a third stage, Parker Solar Probe will stand out with the Sun towards the Sun, consuming 55 times more energy than I
Weighing only 635 kg, it is a relatively light spacecraft, said Andy Driesman, project manager for the mission at the Applied Physics Laboratory of Johns Hopkins University in the US, in a previous statement from NASA.
"And it has to be, because it takes an immense amount of energy to get to our final orbit around the Sun," Driesman added.
The Parker Solar Probe will zoom through space on a highly elliptical orbit at speeds of up to 700,000 km / h, setting the record for the fastest spacecraft in history.
During its nominal mission period of just under seven years, the Parker Solar Probe will complete 24 orbits of the Sun and reach 3.8 million
In orbit near the Sun, the real challenge is to save the spacecraft from burning ,
"The latest advances in materials science have given us the material for the fashion heat shield. The spaceship should not only withstand the extreme heat of the sun, but also stay cool on the back," said Adam Szabo, Parker Solar's mission investigator Rehearsal at NASA's Goddard Space Flight Center in Greenbelt, Maryland.
The heat shield consists of a 4.5 inch thick carbon composite foam material between two carbon fiber facings.
The next time the Parker Solar Probe approaches the sun, temperatures on the heat shield reach nearly 1,371 degrees Celsius. Spacecraft and their instruments are held at a relatively comfortable temperature of about 29.4 degrees Celsius.