We now have direct images of two supermassive black holes: M87* and Sag A*. The fact that we can capture such images is ...
Space.com on MSN
Wobbling exoplanet hints at a hidden exomoon so massive it could redefine the word 'moon' altogether
"In our solar system, the most massive moon is Ganymede, which is still extremely small compared to what we are inferring here." ...
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