Week's Best Space Pictures

Week's Best Space Pictures: Smoky Trail and Solar Streamers

Also, a ring-shaped galaxy shows off its stunning halo, and scientists marvel at the oldest micrometeorites ever found.

Feed your need for heavenly views of the universe with our pick of the most awe-inspiring space pictures.

This week, people around the world watch Mercury cross the sun's disk, scientists uncover the world's oldest space dust, and the raging fires in Fort McMurray, Alberta, spawn enormous clouds of smoke.

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