Coronagraphy
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Coronagraphy is the process of taking images of a star's corona.
A telescope with an attachment that blacks out most of the star itself is typically used to take images the star's corona. Telescopes that perform this imaging can be either Earth-based or space-based, though technological constraints at the present limit meaningful scientific research to studies of the Sun for both sets of telescopes.
The Hubble Space Telescope (HST) performs coronagraphy using the Near Infrared Camera and Multi-Object Spectrometer (NICMOS), and there are plans to have this capability on the James Webb Space Telescope (JWST) using its Near Infrared Camera (NIRCam).
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