One recently discovered extrasolar planet, or exoplanet, orbits a star whose mass is 0.70 times the mass of our sun. this planet has been found to have 2.3 times the earth's diameter and 7.9 times the earth's mass. observations of this planet over time show that it is in a nearly circular orbit around its star and completes one orbit in only 9.5 days. how many times the orbital radius r of the earth around our sun is the exoplanet's orbital radius around its sun. assume that the earth is also in a nearly circular orbit.
a.) 0.026r
b.) 0.078r
c.) 0.70r
d,) 2.3r
Answers: 1
= Earth’s period
= planet’s period
= sun’s mass
= earth’s radius
and 
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