AST101H1 Lecture Notes - Lecture 22: Exoplanet, Light Curve, Methods Of Detecting Exoplanets
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AST101H1 Full Course Notes
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Difference between an image and a light curve is. A light curve combines all the light in the image. In an exoplanet light curve, why is the eclipse shallow while transit is deep. Exoplanet is fainter than its parent star. Planet orbiting a star other than the sun. Been able to block out bright light of parent star, revealing faint surrounding planets. Mess left over after subtracting starlight from image. When one celestial object passes in front of another from our point of view, it is called a transit. Measure change in brightness (light curve) but can"t see an image. Transits occur only if planets orbit happens to be on edge as viewed from earth. Can be brief (an hour or two) -- need to watch at right time. Dip in light curve can be tiny -- need precise measurements. Easily reveals multiple planets around the same star: a solar system. Transits: when exoplanet passes front of parent star.
