Earth
Artificial cloud created at the edge of space
A rocket launch on Saturday released dust high above the Earth – the experiment could help researchers understand mysterious 'night-shining' clouds
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A rocket launch on Saturday released dust high above the Earth – the experiment could help researchers understand mysterious 'night-shining' clouds
The nuclear isotopes that power missions like Cassini are leftovers from Cold War reactors and are set to run out in a decade if no more are produced