This image made available by NASA shows an artist's rendering of the Parker Solar Probe approaching the Sun. On Tuesday, Dec. 14, 2021, NASA announced that the spacecraft has plunged through the unexplored solar atmosphere known as the corona in April, and will keep drawing ever closer to the sun and diving deeper into the corona.

NASA said on Friday that its Parker Solar Probe was 'safe' and operating normally after successfully completing the closest-ever approach to the sun by any human-made object.