The success of the Parker Solar Probe will ultimately depend on the data it sends back.
The good news is that the probe’s communication system is performing well, and actually exceeding the expectations set during pre-launch testing. Because of that, the probe has managed to transfer a whopping 22 GB worth of data from its first two close passes of the Sun, which is 50 percent more than scientists planned on having by this point in the mission.
For more, check out this MSN story.