# Questions tagged [keplers-laws]

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### Calculating the separation of binary stars

I'm struggling with the following problem: An eclipsing binary has period 0.10 years and each component has speed in its orbit of 19AU per year (or 90km/s) Assuming both stars have the same mass and ...
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### What's the simplest evidence for Kepler's first law?

What is the simplest explanation that provides enough evidence for the first Kepler law? i.e. that planets around the Sun travel on ellipses with the Sun at one of the two foci. Are the three Kepler ...
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### Calculate eccentric anomaly using Kepler's equation

I'm developing a C++ computer library with the formulas in the book "Practical Astronomy with your Calculator or Spreadsheet 4th Edition" but I have a problem with the formula 56, "...
• 655
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### At what distance does MOND Modified Newtonian Dynamics take effect?

At what distance does MOND Modified Newtonian Dynamics take effect? I understand MOND is described in relation to very slow accelerations, which is related to distance. It is mentioned it has an ...
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### How can I determine a planet's orbital size if it is moving around an oscillating star?

I'd like to know how to calculate the size of the planet's orbit, given that it is the only one orbiting around a star, and that this star is oscillating with an amplitud of 0.026'' in 25 year periods....
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### Orbit equation solver giving wrong orbits

Recently I've become interested in simulating orbital mechanics using Kepler's equations, and in Unity I created my own equation solver by following this paper I found. However, inputting Earth's ...
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### T Coronae Borealis

As it will explode this year or so, I became interested in the binary T Coronae Borealis. According to wikipedia, https://en.wikipedia.org/wiki/T_Coronae_Borealis R Cor Bor the binary masses are 1.34 ...
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