Relating to a coronagraph, an astronomical instrument that blocks the bright light of the sun's disk to observe the fainter corona and surrounding space.
From coronagraph (corona + -graph, to record/observe) + -ic. The instrument 'writes' or records images of the corona by blocking direct sunlight.
Coronagraphs revolutionized solar science by letting us see the sun's corona without waiting for a total eclipse—now we can study the sun's most violent and beautiful regions any clear day!
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