Milky Way
Nearest alien civilization may be 33,000 light years away
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New research suggests the closest technological civilization in the Milky Way could be about 33,000 light years from Earth. For such a society to coexist with humanity, it would need to have endured for at least 280,000 years. The findings, presented at a joint meeting in Helsinki, underscore the rarity of extraterrestrial intelligence.
Gaia telescope uncovers giant wave rippling through Milky Way
Astronomers using the European Space Agency's Gaia telescope have discovered a colossal wave propagating through the Milky Way galaxy, affecting stars tens of thousands of light-years away. This undulating motion, visible in the galaxy's disc, resembles ripples in a pond and involves both stellar positions and movements. The origin of this phenomenon remains unknown, though it may stem from a past galactic collision.