Researchers have discovered what powers brilliant outbursts of Northern Lights: gigantic plasma bullets launched toward Earth by explosions 1/3rd of the way to the Moon.
The sun is entering its 3rd year of eerie calm. Sunspots are rare and solar flares simply aren't happening. Is this "solar minimum" lasting longer than it should? A NASA scientist has examined centuries of sunspot data to find the answer.
Mix moondust with epoxy, add a dash of carbon nanotubes, and spin. The result? A parabolic mirror perfectly suited for a lunar observatory. A NASA scientist has discovered this new recipe for making telescopes out of moondust, and to prove it works he has spun a "moondust mirror" here on Earth.