NASA's Parker Solar Probe will fly closer to the sun than ever on Christmas Eve

NASA's Parker Solar Probe is still zipping around the sun making history, and it's gearing up for another record-setting approach this week. On December 24 at 6:53AM ET, the spacecraft's orbit will take it just 3.8 million miles from the solar surface, according to the space agency. That'll be the closest it -- or any other probe -- has ever come to the sun. The milestone will mark the completion of the Parker Solar Probe's 22nd orbit around our star, and the first of the three final closest fly...