White Dwarf's Thermonuclear 'Kaboom' More Volatile Than Thought | Video
In 1604, Johannes Kepler saw a supernova much brighter than Jupiter. Now, an 8-day stare at the remnant by the Chandra X-ray Telescope is making astronomers believe the small star exploded with more power (and further away) than previously believed.
Credit: NASA/CXC/A. Hobart