A new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 30 AU and takes 140 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units. [NOTE: AU stands for "astronomical unit". It is the average distance between Earth & the Sun. 1 AU= 1.496 × 10¹1 m.]

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Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Determine the mass of a star
A new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 30 AU and
takes 140 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units. [NOTE: AU stands for
"astronomical unit". It is the average distance between Earth & the Sun. 1 AU = 1.496 × 10¹1 m.]
Transcribed Image Text:Determine the mass of a star A new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 30 AU and takes 140 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units. [NOTE: AU stands for "astronomical unit". It is the average distance between Earth & the Sun. 1 AU = 1.496 × 10¹1 m.]
Expert Solution
Step 1

Given data:

The radius of the circular orbit, R=30 AU=4.488×1012 m

Time period, T=140 days=1.21×107 s

The diagram of the situation is given below-

Physics homework question answer, step 1, image 1

 

In the above diagram,

M is the mass of the star, m is the mass of the planet, Fg is the gravitational force between the planet and the star and R is the orbital radius.

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