Consider a star of mass M₁ that hosts a planet of mass M₂ on a circular orbit with semi- major axis a. The mass of the planet is related to the orbital velocity of the star by the expression G M₁a Using Kepler's 3rd law show that this expression can be written as V₁ = M21 2TG\1/3 MP where P is the orbital period of the planet around the star. V₁ = M₂ 2

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Consider a star of mass M₁ that hosts a planet of mass M₂ on a circular orbit with semi-
major axis a. The mass of the planet is related to the orbital velocity of the star by the
expression
G
M₂1 Μια
Using Kepler's 3rd law show that this expression can be written as
V₁ =
2πG
(27²) ¹/3
9
M²P
where P is the orbital period of the planet around the star.
V₁ = M₂
Transcribed Image Text:Consider a star of mass M₁ that hosts a planet of mass M₂ on a circular orbit with semi- major axis a. The mass of the planet is related to the orbital velocity of the star by the expression G M₂1 Μια Using Kepler's 3rd law show that this expression can be written as V₁ = 2πG (27²) ¹/3 9 M²P where P is the orbital period of the planet around the star. V₁ = M₂
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