The lecturer went through part of the proof so i am stuck on finishing it off.(adsbygoogle = window.adsbygoogle || []).push({});

equation: ΔT = PR_{*}/πα

where P is the period of planet around star

R_{*}is radius of star

α is orbital radius of planet

what I have done so far...

ω (orbital speed) = v/α also = 2π/p (p being a planetry year)

and linear velocity, v = 2R_{*}/ΔT

⇒ ΔT = 2R_{*}/α

so there are obviously some steps to get from 2R_{*}/α to PR_{*}/πα but i am not sure how to go about solving it.

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# I Proving equation for duration of transit

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