<p>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 href="http://chandra.si.edu/photo/2016/tycho/" target="_blank">a movie of the supernova's expanding remains</a>.</p>

Space Ghost

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.

Photograph by X-ray: NASA/CXC/GSFC/B.Williams et al; Optical: DSS

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.

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