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17 votes

Why is Mercury's orbit so unusual?

Mercury appears to be on the boundary between being stable and unstable in the Solar System (e.g. Lithwick & Wu 2011). Its orbit can be highly perturbed by interactions, principally with Venus and ...
ProfRob's user avatar
  • 155k
7 votes

Why is Mercury visible

With an albedo of 0.09 (Mallama 2017), it's true that Mercury has the lowest albedo of all planets. But reflecting 9% of something that is really, really, really bright, is still pretty bright. ...
pela's user avatar
  • 38.7k
7 votes

Is there an L2 Lagrange point for Mercury that lies in the shadow?

I'm afraid not. The umbral limit for Mercury will vary (as a result of Mercury's eccentric orbit) but is about 170,000 km from the planet. The Lagrange point (again it moves due to the non-circular ...
James K's user avatar
  • 125k
3 votes

κ₀ for Mercury—Formula (another definition)

I’ll write how I got the 4th degree polynomial, which is mentioned in the comments. I used the same formulas from the answer to the previous formulation of the problem. According to the conditions of ...
ayr's user avatar
  • 835

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