Posted by **Gina** on Tuesday, February 15, 2011 at 8:22pm.

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 41.3 km/s and 52.7 km/s. The slower planet's orbital period is 7.74 years. (a) What is the mass of the star? (b) What is the orbital period of the faster planet, in years?

i used v=2pi(radius)/T to find the radius, and converted the km to m and the years to seconds, but how do i get the mass from this?

## Answer this Question

## Related Questions

- physics 1 - Two newly discovered planets follow circular orbits around a star in...
- college physics 1 - Two newly discovered planets follow circular orbits around a...
- College Physics - Two newly discovered planets follow circular orbits around a ...
- physcs - Two newly discovered planets follow circular orbits around a star in a...
- physics 213 - Two newly discovered planets follow circular orbits around a star ...
- Physics 1 - In recent years, scientists have discovered hundreds of planets ...
- Astro - A newly discovered planet orbits a distant star with the same mass as ...
- science - write T if the statement is true or F if it is false. a.)All the ...
- physics - Planet A and planet B are in circular orbits around a distant star. ...
- physics - consider a star that orbits around Sagittarius A* in a circular orbit ...

More Related Questions