In 2017, the first confirmed visitor from another star system tumbled through the solar system on a path that should have been simple to read, then accelerated slightly as it left without showing the coma or tail of an active comet — a gap that let Harvard astronomer Avi Loeb argue it might be alien technology, a claim most astronomers reject but one that has never quite gone away.

From Spacedaily

In October 2017, astronomers using the Pan-STARRS survey telescope in Hawaii detected a small object moving through the inner solar system on a hyperbolic path, too fast for the Sun to hold. It had been found on 19 October, after its closest approach to the Sun in September, so it was already on its way [...] The post In 2017, the first confirmed visitor from another star system tumbled through the solar system on a path that should have been simple to read, then accelerated slightly as it left without showing the coma or tail of an active comet — a gap that let Harvard astronomer Avi Loeb argue it might be alien technology, a claim most astronomers reject but one that has never quite gone away. appeared first on Space Daily .