A visualization of Earth's South Pole and Antartica from NASA. Posted by Stuart Rankin.

A visualization of Earth's South Pole and Antartica from NASA. Posted by Stuart Rankin.

Black Holes Have Simple Feeding Habits (NASA, Chandra, 6/18/08) by NASA's Marshall Space Flight Center, via Flickr

Black Holes Have Simple Feeding Habits (NASA, Chandra, 6/18/08) by NASA's Marshall Space Flight Center, via Flickr

The Butterfly Nebula - NGC 6302 (also called the Bug Nebula, Butterfly Nebula, or Caldwell 69) is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae. The spectrum of NGC 6302 shows that its central star is one of the hottest stars in the galaxy, with a surface temperature in excess of 200,000 K, implying that the star from which it formed must have been very large.

The Butterfly Nebula - NGC 6302 (also called the Bug Nebula, Butterfly Nebula, or Caldwell 69) is a bipolar planetary nebula in the constellation Scorpius. The structure in the nebula is among the most complex ever observed in planetary nebulae. The spectrum of NGC 6302 shows that its central star is one of the hottest stars in the galaxy, with a surface temperature in excess of 200,000 K, implying that the star from which it formed must have been very large.

Olympus Mons, an extinct shield volcano on Mars. At three times the height of Mount Everest, it is the tallest mountain in our solar system.

Olympus Mons, an extinct shield volcano on Mars. At three times the height of Mount Everest, it is the tallest mountain in our solar system.

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