A technique for directly photographing exoplanets and other faint objects by blocking out the overwhelming light from nearby bright sources like stars. This method allows astronomers to study the properties of these objects without relying on indirect detection methods.
The term combines 'direct' from Latin 'directus' (straight, unmediated) with 'imaging' from Latin 'imago' (likeness, picture). It emerged in the late 20th century as astronomers distinguished this challenging technique from indirect methods like transit photometry or radial velocity measurements.
Direct imaging is like trying to photograph a firefly next to a lighthouse from 100 miles away - the brightness difference between a star and its planet can be 10 billion to one! The first directly imaged exoplanet wasn't discovered until 2008, and we've only managed to photograph about 50 exoplanets this way despite knowing of over 5000.
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