Question: Finding Orbit Sizes. The Doppler method allows us to find a planet s semimajor axis using just the orbital period and the star s mass

Finding Orbit Sizes. The Doppler method allows us to find a planets semimajor axis using just the orbital period and the stars mass (Mathematical Insight 13.1).
Imagine that a new planet is discovered orbiting a 2MSun star with a period of 5 days. What is its semimajor axis?
Another planet is discovered orbiting a 0.5MSun star with a period of 100 days. What is its semimajor axis?

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