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Adding Citation and Adding Wiki Link

While the radial velocity method provides information about a planet's mass, the photometric method can determine the planet's radius. If a planet crosses (transits) in front of its parent star's disk, then the observed visual brightness of the star drops by a small amount, depending on the relative sizes of the star and the planet. For example, in the case of HD 209458, the star dims by 1.7%. However, most transit signals are considerably smaller; for example, an Earth-size planet transiting a Sun-like star produces a dimming of only 80 parts per million (0.008 percent).

Article Evaluation

• Improvements on the light curve analyzation and what the decrease in flux means in terms of length of transit and location of planet to star.
• Technique section for transit photometry is under-representing on some details that could be useful. It talks about advantages and disadvantages but not so much the actual calculations.

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Theoretical transiting exoplanet light curve. This image shows the transit depth, transit duration, and ingress/egress duration of a transiting exoplanet relative to the position of the exoplanet to the star.