The Hubble Space Telescope revisits a star-forming region 5,000 light-years from Earth, which it first captured in 1997, revealing how the cosmic nursery has changed over human timescales. When you buy through links on our articles, Future and its syndication partners may earn a commission. Quick facts What it is: Trifid Nebula (Messier 20) Where it is: 5,000 light-years from Earth in the constellation Sagittarius When it was shared: A... [3521 chars]
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