Tag: Astronomy
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Busy Little Iceball
So Pluto has a fifth moon in orbit, temporarily designated P5, to accompany Charon, Nix, Hydra, and um…P4. (I guess someone will get around to naming P4 and P5 one day. I nominated “Fred” and “George”.) P5 is so tiny and faint that even our best instruments can only give it a maximum size: it’s…
Galileo's Pendulum 