coronagraph

American  

[kuh-roh-nuh-graf, -grahf] / kəˈroʊ nəˌgræf, -ˌgrɑf /

Or coronograph

noun

Astronomy.

1. an instrument for observing and photographing the sun's corona, consisting of a telescope fitted with lenses, filters, and diaphragms that simulate an eclipse.

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coronagraph British  

/ kəˈrəʊnəˌɡrɑːf, -ˌɡræf /

noun

1. an optical instrument used to simulate an eclipse of the sun so that the faint solar corona can be studied

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Other Word Forms

• coronagraphic
  adjective

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Etymology

Origin of coronagraph

1885–90; earlier coronograph. See corona, -graph

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Example Sentences

See Examples For:

coronagraph

The coronagraph now meets the team's demanding performance expectations.

From Science Daily ● Oct. 17, 2026

That additional stability is essential for coronagraph observations.

From Science Daily ● Oct. 2, 2026

By blocking that light, the coronagraph could allow scientists to detect the much fainter light reflected by planets orbiting nearby.

From Science Daily ● Sep. 21, 2026

“It’s a little bit like having a kid go off to college,” said Vanessa Bailey, JPL instrument scientist for the planet-hunter, called a coronagraph.

From Los Angeles Times ● Aug. 30, 2026

Similar ill success attended his and Professor Riccò's employment, on Mount Etna in July, 1894, of a specially designed coronagraph.

From A Popular History of Astronomy During the Nineteenth Century Fourth Edition by Agnes M. (Agnes Mary) Clerke

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