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The scientists who precisely measure the position of Earth are in a bit of trouble. Their measurements are essential for the ...
Imagine if a species grew up on a planet that had a black hole moon the mass of the moon. They’d have tides, they’d have an unobstructed view of the night sky, and they’d have no clue about this ...
A microquasar belonging to our Milky Way galaxy has set records by generating cosmic rays with energy levels never before seen.