Sunday, June 25, 2017

The N44 Superbubble

What created this gigantic hole? The vastemission nebula N44 in our neighboring galaxy the Large Magellanic Cloud has a large, 250light-year hole and astronomers are trying to figure out why. One possibility is particle windsexpelled by massive stars in the bubble's interior that are pushing out the glowing gas. This answer was found to be inconsistent with measured wind velocities, however. Another possibility is that the expanding shells of oldsupernovas have sculpted the unusual space cavern. An unexpected clue of hot X-rayemitting gas was recently been detected escaping the N44 superbubble. The featured image was taken in three very specific colors by the huge 8-meter Gemini South Telescope onCerro Pachon in Chile.
Image Credit & CopyrightGemini Obs.AURA,NSF

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