NASA spacecraft ready to launch through Sun's burning atmosphere

The first ever spacecraft to fly directly toward the Sun is poised to blast off Saturday, on a mission to plunge into our star's sizzling atmosphere and unlock the mysteries of the center of the solar system. NASA's car-sized, $1.5 billion Parker Solar Probe is scheduled to launch on a Delta IV Heavy rocket from Cape Canaveral, Florida during a 65-minute launch window that opens at 3:33 am (0733 GMT). "We are going to be in an area that is so exciting, where solar wind -- we believe -- will be accelerating," said NASA planetary science division director Jim Green.

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