NOW THIS is perfect (several) minute physics content :)
Lovely topic, great explanation, entirely logical suggestion as well. Thanks for sharing, thanks for teaching!!
Fascinating video. Also it kinda feels like a response video directed to the comments on the prior video about orbits where people talking about using that barycenter as their defining point.
1:56 The caption implies you don't consider brown dwarfs to be stars, but the drawing gives 13 Jupiter masses as the cut-off, which is lower limit for brown dwarfs. If you don't consider brown dwarfs to be stars, then the cut-off is 70 Jupiter masses.
for a second I thought this was gonna be a video about how we figured out that the moon generally goes around the earth, considering its the only thing that actually does orbit the earth, which slightly complicated the conversation around heliocentrism. Once galileo showed Jupiter had moons though, it became obvious both the planets and the sun could have (what would come to be called) satellites.
I never thought about the problems with the barycenter definition. And never imagined that the L4/L5 points could be useful to determine if a system is a "binary" or not. Great video!
I once learned that the L4/L5 bodies are called "Trojans", because they are chasing each other like Achilles chased Hector around Troy to avenge the death of Patroclos. Hence, the L4 bodies are called the "Hector group" and the L5 bodies are called the "Achilles group". And that's why the bodies in the L4 and L5 points of Jupiter were named after characters in the Trojan War, because Jupiter was the first planet where those bodies were found.
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Lovely topic, great explanation, entirely logical suggestion as well. Thanks for sharing, thanks for teaching!!
Hydrogen bomb: I'm something of a star, myself.