- #1
TmrK
- 21
- 0
Homework Statement
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. The orbital speeds of the planets are determined to be 41.7 km/s and 55.5 km/s. The slower planet's orbital period is 8.04 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?
Homework Equations
M= r2T/G
T= 2[itex]\Pi[/itex]r3/2/[itex]GME\sqrt{}[/itex]
The Attempt at a Solution
I assume that the radius of the slower moving planet must be found first. Also, as for finding the period, does that same r need to be found, or is this going to be a very elaborate "plugging in the variables" type of equation?
Last edited: