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#241 - Estrelas alienígenas: astrônomos identificam 33 mil estrelas vindas de fora da Via Láctea

Com base em dados do projeto Gaia - que vem mapeando a localização de 1 bilhão de estrelas - astrônomos perceberam que 33 mil delas se moviam completamente diferente do conjunto da Via Láctea. O time, que também estudou dados sobre a química de 600 estrelas, confirmou que elas vieram de algum lugar para além da Via Láctea. 

crédito: ESA

Megan Bartels (Space):
Scientists have identified the corpse of a galaxy that fell into the Milky Way about 10 billion years ago in what was likely the last major overhaul to our home galaxy during its development.
That's the conclusion of new research based on 2 billion measurements of how stars within the Milky Way are moving. Those measurements let scientists identify about 33,000 stars that live in our galaxy but were born elsewhere, carried here during a giant galactic collision.
"The Milky Way is a cannibal. It has eaten many dwarf galaxies in the past, and we've just found a major one that it ate in the past," Kathryn Johnston, an astronomer at Columbia University in New York who wasn't involved in the new research, told Space.com.