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An Infant System.

“[T]he most breathtaking aspects of the image are the rings and gaps in the disk, never imaged before in this much detail. The largest gaps likely contain protoplanets, which form by collecting gas, dust, and small meteoroid fragments, gradually clearing their orbit of that debris. The combination of those gaps and the young age of HL Tauri suggest planets may form more quickly than astronomers think.”

Also in space news, the Atacama Large Millimeter/submillimeter Array (ALMA) captures our best look yet at potential planetary formation around a newborn star, 450 light years away. “The disk surrounding HL Tauri is much bigger than Neptune‚Äôs orbit, so any planet in the gaps would at least begin at a larger orbit than the major planets in the Solar System. Additionally, other gaps could be ‘resonances’: orbits where the combined gravity of the star and protoplanets drive matter out, concentrating it in the rings.”

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