(detection/observation of exoplanets by taking pictures of it)
Direct imaging is a method of discovering and observing extra-solar planets,
but can be done only for nearby stars, planets orbiting far from their
stars (e.g., many AU), and hot (bright) planets and/or cool stars,
such as brown dwarfs. Planets have been observed and discovered using
this technique, for example, around HR 8799.
Direct imaging is considered a great advantage in spotting some
types of biosignatures, such as any within the "shine" of a planet.
The term direct imaging also comes into use for other
challenging-to-image objects such as protoplanetary disks.
Referenced by pages:
adaptive optics (AO)
Beta Pictoris b (β Pic b)
brown dwarf (BD)
extreme adaptive optics (ExAO)
51 Eridani b
HD 209458 b
Lyot coronagraph (CLC)
projected semi-major axis
protoplanetary disk (PPD)
James Webb Space Telescope (JWST)
Roman Space Telescope (RST)