coronagraph

or co·ro·no·graph

[ kuh-roh-nuh-graf, -grahf ]

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.

coronagraph

/ -ˌɡræf; kəˈrəʊnəˌɡrɑːf /

noun

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

Other Words From

• co·ro·na·graph·ic [k, uh, -roh-n, uh, -, graf, -ik], adjective

Word History and Origins

Origin of coronagraph¹

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

Example Sentences

It will also carry the first operational compact coronagraph that will help detect space weather for early warnings of disruptions to power grids, communications and navigation systems.

From Los Angeles Times

One of the key instruments the US will provide for both missions is a coronagraph, a device that blocks out the glare of the full Sun to allow processes taking place near the solar surface to be seen more easily.

From BBC

The direct method of imaging exoplanets involves using a coronagraph or starshade to block a host star's light, allowing for scientists to capture a faint image of the new world in orbit.

From Science Daily

Astronomers solve this problem by filtering starlight with an item known as a coronagraph, which blocks out the bright central area of the star, and by keeping images steady and crisp with adaptive optics technology.

From Scientific American

But Roman will play a crucial role alongside its other scientific objectives: testing the advanced coronagraph technology that will be needed to produce images of potentially habitable Earth-like worlds around stars like our sun.

From Scientific American