coronagraph
noun
co·ro·na·graph
kə-ˈrō-nə-ˌgraf 
variants
or less commonly coronograph
plural coronagraphs also coronographs
: a telescope for observation of a star's corona
The American spacecraft was to carry the solar coronagraph, the only instrument on the mission capable of imaging the sun's polar regions …—
M. Mitchell Waldrop
M. Mitchell WaldropUsing an instrument called a coronagraph, the astronomers can block a star's light, to catch the dim glow of dark matter that may surround it.—Jonathan Weiner
Jonathan WeinerExamples of coronagraph in a Sentence
Recent Examples on the Web
The effectiveness of the coronagraph will determine just how close to the star an object can be imaged.
—John Timmer, ArsTechnica, 23 Apr. 2026
On Thursday, April 2, the comet will enter the field of view of SOHO’s LASCO C3 coronagraph (the blue image on the right) at about the 8 o'clock position to start its two-day sprint toward the Sun.
—Tony Hoffman, PC Magazine, 2 Apr. 2026
Roman also carries a coronagraph, a pathfinder instrument that can block out a star’s blinding light to directly photograph planets orbiting around it.
—Grant Tremblay, The Conversation, 14 Jan. 2026
Scientists are especially excited about the coronagraph, because this instrument can be used to directly image exoplanets.
—Monisha Ravisetti, Space.com, 8 Jan. 2026
See All Example Sentences for coronagraph
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John Timmer, ArsTechnica, 23 Apr. 2026
On Thursday, April 2, the comet will enter the field of view of SOHO’s LASCO C3 coronagraph (the blue image on the right) at about the 8 o'clock position to start its two-day sprint toward the Sun.
—Tony Hoffman, PC Magazine, 2 Apr. 2026
Roman also carries a coronagraph, a pathfinder instrument that can block out a star’s blinding light to directly photograph planets orbiting around it.
—Grant Tremblay, The Conversation, 14 Jan. 2026
Scientists are especially excited about the coronagraph, because this instrument can be used to directly image exoplanets.
—Monisha Ravisetti, Space.com, 8 Jan. 2026
See All Example Sentences for coronagraph
Cite this Entry
“Coronagraph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coronagraph. Accessed 14 May. 2026.
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