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View Full Version : A Disk of Debris is Forming Moons Around an Exoplanet. A Proto-Lunar Disk?



Fraser
2019-Jul-15, 07:22 PM
Astronomers have discovered, for the first time, moons forming in the disk of debris around a large exoplanet. Astronomers have suspected for a long time that this is how larger planetsólike Jupiter in our own Solar Systemóget their moons. It’s all happening around a very young star named PDS 70, about 370 light years away …
Continue reading "A Disk of Debris is Forming Moons Around an Exoplanet. A Proto-Lunar Disk?" (https://www.universetoday.com/142814/a-disk-of-debris-is-forming-moons-around-an-exoplanet-a-proto-lunar-disk/)
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mkline55
2019-Jul-15, 08:07 PM
The article calls it a disk of debris, yet also refers to the "nebular hypothesis" and describes that as starting as a giant molecular cloud. Does that mean it started as a giant molecular cloud of debris? And debris from what? Does it mean the debris isn't just separate molecules, but consists of dust, rocks, and other larger objects? If so, is that considered a "giant molecular cloud"?