“Technically, there is no surface of the Sun,” says UW-Madison’s Sanjay Limaye.
The senior scientist and educator with the Space Science and Engineering Center explains that unlike the hard, physical boundary here on Earth, the Sun’s surface is a hot mass of gas that is more or less continuous with its atmosphere.
“The Sun is a star [...]

Scientific kites are back, flying payloads high into the atmosphere and delivering data at a fraction of the cost of satellites and specialized planes.