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 Word Forms

• coronagraphic adjective

Word History and Origins

Origin of coronagraph¹

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

Example Sentences

The larger one, known as the Coronagraph spacecraft, will explore the Sun’s corona, or outer atmosphere, while the smaller spacecraft Occulter will take a voyage through the same region with special navigation sensors and low-impulse thrusters that will allow the Coronagraph to do its job.

Read more on Salon

India’s coronagraph, Prof Ramesh says, has a slight advantage over the coronagraph in Nasa-ESA's joint Solar and Heliospheric Observatory.

Read more on BBC

The coronagraph on Nasa-ESA's mission, he says, is bigger which means it hides not only the photosphere but also parts of corona - so it cannot see the genesis of a CME if it originates in the hidden region.

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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.

Read more on 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.

Read more on BBC