Neptune-sized body would be the first known moon outside solar system and the largest moon yet discovered
Astronomers believe they have discovered the first known moon beyond our solar system, in orbit around a gigantic planet 8,000 light years away.
The so-called exomoon, which is estimated to be the size of Neptune, would also be the biggest known moon, far exceeding anything known to exist in our own solar system. The team behind the apparent discovery said it needed further confirmation but that they had failed to find any other convincing explanation for their data.
Continue reading...from The Guardian https://ift.tt/2IBb3f8
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