coronagraph

noun
co·​ro·​na·​graph | \ kə-ˈrō-nə-ˌgraf How to pronounce coronagraph (audio) \
variants: or less commonly coronograph

Definition of coronagraph

: a telescope for observation of the sun's corona

Examples of coronagraph in a Sentence

Recent Examples on the Web The coronagraph includes a disk to block out most of the light to look at what is going on in the sun’s outer atmosphere. Kenneth Chang, New York Times, "We’ve Never Seen the Sun’s Top or Bottom. Solar Orbiter Will Change That.," 10 Feb. 2020 New technology will enable the coronagraph to block multiple stars at the same time, needed to hunt for exoplanets in star systems that, unlike our own, have two stars or more. Umar Farooq, Science | AAAS, "‘We put everything into it.’ Modest telescope could have big impact on Turkish science," 4 Mar. 2020 But like other premier telescopes, DAG will also have a coronagraph, an instrument that masks bright stars to remove their glare so that dim planets orbiting them can be imaged directly. Umar Farooq, Science | AAAS, "‘We put everything into it.’ Modest telescope could have big impact on Turkish science," 4 Mar. 2020 And like the coronagraph, the starshade is not a fully mature technology yet. Loren Grush, The Verge, "The search for alien life needs a new space telescope, astronomers say," 8 Sep. 2018 As part of Breakthrough Watch, the organization is studying a small coronagraph-carrying space telescope akin to ACESat. Corey S. Powell, Scientific American, "The Hunt Is on for Alpha Centauri’s Planets," 5 Aug. 2019 To avoid being dazzled by the bright disk of Earth, the telescope would need a mask, known as a coronagraph, to block it out. Daniel Clery, Science | AAAS, "Space telescope would turn Earth into a giant magnifying lens," 6 Aug. 2019 Due to budget concerns, NASA has been looking at ways to reduce the cost of the coronagraph by reducing the number of masks and filters the instrument uses, according to Space News. Loren Grush, The Verge, "A cold ‘super-Earth’ may live around a nearby star," 14 Nov. 2018 But Ribas says a coronagraph is the most certain way to see this world. Loren Grush, The Verge, "A cold ‘super-Earth’ may live around a nearby star," 14 Nov. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coronagraph.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of coronagraph

1885, in the meaning defined above

History and Etymology for coronagraph

corona + -graph

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Time Traveler for coronagraph

Time Traveler

The first known use of coronagraph was in 1885

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Statistics for coronagraph

Last Updated

10 May 2020

Cite this Entry

“Coronagraph.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coronagraph. Accessed 5 Jul. 2020.

More from Merriam-Webster on coronagraph

Britannica.com: Encyclopedia article about coronagraph

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