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5 votes
2 answers
401 views

What is Mercury and Venus’ apparent retrograde motion?

I was having a discussion about Mercury being in retrograde, and I had explained it as Earth moving faster tangentially than Mercury so it looks like it’s moving backwards when we compare it with the ...
Dylan VanAllen's user avatar
2 votes
0 answers
61 views

Why are triple conjunctions in a resonance forbidden?

I was reading the Wikipedia article about orbital resonance and noticed that Laplace resonances forbid triple conjunctions. This seems to be supported by the Io-Europa-Ganymede system and the Nyx-Styx-...
WarpPrime's user avatar
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