A NASA astrophysicist has recently proposed a theory that could potentially resolve the long-standing Fermi Paradox. The theory suggests that alien civilizations may be scattered sparsely throughout the Milky Way. This implies that while extraterrestrial ...

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New simulations of Milky Way-like galaxies reveal that the strange split between two chemically distinct groups of stars may arise from several very different evolutionary events. Bursts of star formation, shifts in flowing gas, and even streams of metal ...

The Milky Way as a laboratory for civilizations Any attempt to chart alien societies has to start with the structure of The Milky Way itself, a disk roughly 100,000 light years across with hundreds of billions of stars and a complex history of star formation. Astrophysicists treat that disk as a kind of natural experiment, where planetary systems form at different distances from the galactic ...

Look up on a dark night and the Milky Way appears as a calm band of stars across the sky. But our galaxy has a violent past. For more than 13 billion years it has grown through star formation and mergers with other galaxies.