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A trio of faint, 'ghostly' galaxies provides new observational hints about the nature of dark matter, suggesting what it might — and might not — be.
The Rubin Observatory released its first LSST Camera dataset, capturing 500,000 galaxies in the COSMOS field, marking a significant milestone for astronomical surveys.
Astronomers using JWST have directly observed a cosmic recycling cycle where gas heated by a black hole's jets cools into filaments that fall back, feeding the black hole. This confirms why supermassive black holes never run out of fuel.