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
Scientists created an attachment for the JWST called a coronagraph.
—Stephanie Edwards, Discover Magazine, 25 June 2025
There’s a second planet closer to the host star that’s hidden by the black disk in the image, above, called a coronagraph, which the Webb Telescope uses to block out the star’s light, making its search for dim planets easier.
—Jamie Carter, Forbes.com, 12 June 2025
For instance, telescopes these days rely on very sophisticated instruments called coronagraphs to observe light coming from objects orbiting bright stars.
—Victoria Corless, Space.com, 22 May 2025
Still waiting for coronagraph data to inform model runs, but impact could be late April 15 or early April 16.
—Daisy Dobrijevic, Space.com, 14 Apr. 2025
See All Example Sentences for coronagraph
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Stephanie Edwards, Discover Magazine, 25 June 2025
There’s a second planet closer to the host star that’s hidden by the black disk in the image, above, called a coronagraph, which the Webb Telescope uses to block out the star’s light, making its search for dim planets easier.
—Jamie Carter, Forbes.com, 12 June 2025
For instance, telescopes these days rely on very sophisticated instruments called coronagraphs to observe light coming from objects orbiting bright stars.
—Victoria Corless, Space.com, 22 May 2025
Still waiting for coronagraph data to inform model runs, but impact could be late April 15 or early April 16.
—Daisy Dobrijevic, Space.com, 14 Apr. 2025
See All Example Sentences for coronagraph
Cite this Entry
“Coronagraph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coronagraph. Accessed 5 Jul. 2025.
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