Scientist proposes to send spacecraft to the sun's corona.
The sun's outer atmosphere. He dreams of stepping into the light - literally. Where Daniel Winterhalter wants to send a spacecraft might make a few earthlings a bit hot under the collar. The corona is extremely hot - start thinking about it in millions of degrees, and it's also the birthplace of solar wind. Instead of blowing dust around, it carries 1 million tons of gas particles past the planets and into the galaxy.