<p>A <a href="https://www.cfa.harvard.edu/~pberlind/atlas/htmls/wrstars.html">Wolf-Rayet star</a> evolves quickly and is much more massive than our sun. This particular one, named Nasty 1, swirls in the middle of a two-trillion-mile-wide nebula in this illustration released by NASA. </p>

A Massive Nasty

A Wolf-Rayet star evolves quickly and is much more massive than our sun. This particular one, named Nasty 1, swirls in the middle of a two-trillion-mile-wide nebula in this illustration released by NASA.

Photograph by NASA/Hubble

Week's Best Space Pictures: Champagne Flows, Pockmarked Moon

Bubbles of hot gas burst and Saturn's moon Rhea displays its cracks and crags in this week's most amazing views from space.

Feed your need for "heavenly" views of the universe every Friday with our picks of the most awe-inspiring space pictures. This week, enormous gas bubbles burst like champagne and Cassini captures a moon's cratered face.

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