
Roughly 1,000 light-years away from Earth, a gigantic disk of gas and dust is swirling around a young star and giving rise to new planets. Not only is it the largest planet-forming disk astronomers have ever found, its behavior is different than any seen before.
The disk spans nearly 400 billion miles (640 billion kilometers)—that’s about 40 times wider than our entire solar system. While it was first identified in 2016, astronomers have now used NASA’s Hubble Space Telescope to…

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