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
For one thing, Webb does not have the exoplanet coronagraph capability that Roman has.
—Jeffrey Kluger/greenbelt, TIME, 8 Feb. 2025
The space telescope will have four primary instruments, including a super-sensitive coronagraph that can detect Earth-size planets around distant stars.
—Tariq Malik, Space.com, 16 Jan. 2025
Those who do not want to miss the show can follow the comet in images from the Solar and Heliospheric Observatory’s Lasco C3 coronagraph, or consult the IAU Minor Planet Center or the Comet OBServation (COBS) database.
—Marta Musso, WIRED, 11 Jan. 2025
Several missions have studied the sun and created artificial eclipses, including the ESA and NASA's Solar Terrestrial Relations Observatory (STEREO) mission that used a coronagraph to block the sun.
—Chandelis Duster, NPR, 21 Dec. 2024
See all Example Sentences for coronagraph 
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Jeffrey Kluger/greenbelt, TIME, 8 Feb. 2025
The space telescope will have four primary instruments, including a super-sensitive coronagraph that can detect Earth-size planets around distant stars.
—Tariq Malik, Space.com, 16 Jan. 2025
Those who do not want to miss the show can follow the comet in images from the Solar and Heliospheric Observatory’s Lasco C3 coronagraph, or consult the IAU Minor Planet Center or the Comet OBServation (COBS) database.
—Marta Musso, WIRED, 11 Jan. 2025
Several missions have studied the sun and created artificial eclipses, including the ESA and NASA's Solar Terrestrial Relations Observatory (STEREO) mission that used a coronagraph to block the sun.
—Chandelis Duster, NPR, 21 Dec. 2024
See all Example Sentences for coronagraph
Dictionary Entries Near coronagraph
Cite this Entry
“Coronagraph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coronagraph. Accessed 11 Feb. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share