NASA's Parker Solar Probe finds fresh clues to decades-old mystery surrounding the sun

A silver and gold trumpet like spacecraft directed at the edge of a glowing orange sphere.

 For decades, scientists have puzzled over why the sun's outer atmosphere, or corona, heats up as it moves further from the sun's surface. 

Now the long list of possible explanations has been trimmed down by one thanks to data collected by NASA's Parker Solar Probe, the fastest human-made object, which has repeatedly skimmed the sun as it hunts for clues to solve the so-called "coronal heating mystery."