NASA, missing and dead scientists
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After nearly 50 years in space, the two Voyager spacecraft are very low on nuclear power. Voyager 1 just shut off another instrument to save the mission.
Galaxies, including the one we call home, are within halos of dark matter. But what exactly dark matter is remains something of a mystery. A research team from Washington University is part of a NASA-led mission taking a step towards answering that question.