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Tag: stars

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Stars May Make Bow Shock Waves

When objects move through a medium, they often push the medium out of their way, creating a wave like the bow wave of a boat pushing water away. When an aircraft is pushing air away in a bow wave, as the speed of the craft nears the speed of sound, the wave becomes compressed into […]

Detecting Advanced Alien Civilizations Won’t Be Easy

Astronomers have suggested that advanced alien civilizations that generate and use energy on a large scale would also produce waste heat that can be detected from a distance. Since modern astronomy can’t detect such heat signatures, they conclude that such civilizations don’t exist. Since a waste heat signature can be detected by our primitive technology, […]