NASA's Parker Solar Probe is about to make its closest approach to the sun. AdvertisementNASA's Parker Solar Probe launched in 2018 and has completed 21 close flybys around the sun. Over the years the Parker Solar Probe, about the size of a small car, has made increasingly close flybys. NASA last heard from Parker Solar Probe on December 22 and expects to hear from it again around midnight between Thursday and Friday, Nour Rawafi, Parker Solar Probe project scientist at Johns Hopkins Applied Physics Lab, said during a recent NASA livestream. Here's what you need to know about this historic mission and how it could help humanity solve some of the world's biggest questions.

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Persons: NASA's Parker, NASA's, shouldn't, Joe Westlake, we're, humanity's, Westlake, Nour Rawafi, Parker, Rawafi, Alex Young Organizations: Probe, NASA, Parker, Johns Hopkins Applied Physics, Heliophysics, American Geophysical Union Locations: American, Philadelphia