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The Universe Expansion Might Be Slowing Down Now
The universe is expanding. That much is clearer. But it’s less clear whether this expansion is accelerating or slowing down. At the heart of this upheaval lies the cosmic yardstick astronomers have ...
Nobel laureate who mapped temperature variations in the cosmic microwave background.
LHAASO has uncovered that micro-quasars, black holes feeding on companion stars, are powerful PeV particle accelerators.
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