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  

/ -ˌɡræf, kəˈrəʊnəˌɡrɑːf /

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

Etymology

Origin of coronagraph

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

Example Sentences

Roman is scheduled to conduct a technology demonstration that will test advanced coronagraph systems.

From Science Daily

Its host star is bright, the brown dwarf sits at an ideal position, and at the Roman Coronagraph's operating wavelengths it will appear faint enough relative to its star to properly evaluate the new technology.

From Science Daily

Thanks to the screening effect of SOHO's coronagraph, 'sungrazer' comets -- those that approach the Sun at very close distances -- also become visible.

From Science Daily

Prof Ramesh is the principal investigator on Visible Emission Line Coronagraph, or Velc - the most important of the seven scientific instruments on Aditya-L1 - and closely monitors and decodes the data it gathers.

From BBC

"Aditya-L1's coronagraph is the exact size that lets it nearly mimic the Moon, fully covering the Sun's photosphere and allowing it an uninterrupted view of almost all of the corona 24 hours a day, 365 days a year, even during eclipses and occultations," says Prof Ramesh.

From BBC