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Scoop.it!
Sunspots are darkened patches on the sun that are not well understood. 
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Scoop.it!
"Our solar system is different than the space right outside it, suggesting two possibilities," says David McComas, IBEX principal investigator in a statement. "Either the solar system evolved in a separate, more oxygen-rich part of the galaxy than where we currently reside, or a great deal of critical, life-giving oxygen lies trapped in interstellar dust grains or ices, unable to move freely throughout space."
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