Retrieving "Coronagraphy" from the archives

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1. Exoplanets

   Linked via "coronagraphy"

   Direct Imaging
   Direct imaging involves taking an actual photograph of the planet separated from the glare of its host star. This technique is challenging due to the extreme contrast ratio ($\approx 10^9$ to $10^{10}$) between the faint planet and the bright star. Successful direct imaging is typically limited to large, young, hot gas giant planets orbiting far from their stars, as older, cooler planets emit insufficient thermal radiation. Specialized techniques like coronagraphy and [adaptive optics](/…