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
That isn't possible for coronagraphs stationed farther away in space, such as SOHO at the L1 Lagrange point, because the moon would never pass through their field of view.
—Daisy Dobrijevic, Space.com, 24 Sep. 2025
The platform hosts four instruments, one of which is a coronagraph to detect the massive eruptions from the Sun that spark geomagnetic storms.
—Kyle Orland, ArsTechnica, 24 Sep. 2025
The satellite’s compact coronagraph telescope will monitor the sun for activity and measure the solar wind, providing a constant stream of data to NOAA’s Space Weather Prediction Center.
—Ashley Strickland, CNN Money, 24 Sep. 2025
The breakthrough came when astronomers used a coronagraph — a disk to block the bright starlight — from Alpha Centauri A, revealing a faint object around it.
—Jamie Carter, Forbes.com, 9 Aug. 2025
See All Example Sentences for coronagraph
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Daisy Dobrijevic, Space.com, 24 Sep. 2025
The platform hosts four instruments, one of which is a coronagraph to detect the massive eruptions from the Sun that spark geomagnetic storms.
—Kyle Orland, ArsTechnica, 24 Sep. 2025
The satellite’s compact coronagraph telescope will monitor the sun for activity and measure the solar wind, providing a constant stream of data to NOAA’s Space Weather Prediction Center.
—Ashley Strickland, CNN Money, 24 Sep. 2025
The breakthrough came when astronomers used a coronagraph — a disk to block the bright starlight — from Alpha Centauri A, revealing a faint object around it.
—Jamie Carter, Forbes.com, 9 Aug. 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 23 Oct. 2025.
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