First spotted in late 1572, the star explosion known as Tycho's Nova left behind gases glowing with X-rays and radio waves. Observations since 2000 have allowed scientists to make a movie of the supernova's expanding remains.
- Week's Best Space Pictures
Week's Best Space Pictures: See a Supernova's Glowing Ghost
Also, the Hubble Space Telescope takes a stunning snapshot of Mars, and one of Saturn's rings gets kinky with two moons.
Feed your need for heavenly views of the universe with our pick of the most awe-inspiring space pictures.
This week, Hubble spots Mars from 50 million miles away, satellites capture a massive wildfire in Canada, and Jupiter's icy moon Europa shows off its enigmatic surface.