Definition of coronagraph
: a telescope for observation of the sun's corona
variants:
or less commonly
coronograph
Updated on: 12 May 2018
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Recent Examples of coronagraph from the Web
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The first is a coronagraph, or a camera with an internal occulter to block the direct light of the star, allowing the light from the planet to enter the instrument.
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Such an instrument, which is essentially a 10,000-kilometer long coronagraph in space, does not yet exist.
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Lately another controversial element has been added to the mission, a coronagraph, which could be used to block the light from a star so that faint planets near them can be discerned.
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The telescope would be designed to reduce scattered light and have a coronagraph and starshade to allow direct imaging of Earth-sized exoplanets.
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But a coronagraph can’t see as much as a telescope observing an eclipse can.
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To see the protoplanetary ring, astronomers use a tool called a coronagraph to block the light of the star.
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.
First Known Use of coronagraph
1885
Learn More about coronagraph
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Britannica.com: Encyclopedia article about coronagraph
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