Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A telescope or an attachment for a telescope equipped with a disk that blacks out most of the sun, used to photograph the sun's corona.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy A
telescope that has an attachment which blocks out the direct light from thesun or otherstar , allowing examination of thecorona and the detection ofexoplanets
Etymologies
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Examples
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Researchers observed the corona with a device called a coronagraph, an instrument that blacks out the disk.
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Researchers observed the corona with a device called a coronagraph, an instrument that blacks out the disk.
Eclipse Opens Window to Solar Eruptions Gene J. Koprowski 1998
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Historically, researchers have studied the corona during eclipses, when the moon blocks out the disk and reveals the corona, or by using an instrument called a coronagraph, which similarly blocks out the sun's disk.
FOXNews.com 2011
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In 1930 he invented an instrument known as the coronagraph, a telescope equipped with an occulting disk sized in such a way as to block out the solar disk, which is more difficult than it sounds.
The Brussels Journal - The Voice of Conservatism in Europe 2009
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By blocking out the light from Alcor with a device called a coronagraph, the study team confirmed that, unknown for centuries, Alcor b indeed orbits the larger star.
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Using a device called a coronagraph that blocks out a star’s light so dimmer objects near it can be seen, the Hubble revealed that Fomalhaut was indeed off-center within its ring.
Hidden Planet Pushes Star’s Ring a Billion Miles Off-Center | Impact Lab 2007
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HR 8799, about 130 light years away (one light-year is about 5.9 trillion miles), was examined in Hubble "coronagraph" images in 1998.
GeekLikeMe.net 2009
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He invented the polariscope, and produced the first solar coronagraph.
Weekend SkyWatcher's Forecast – February 26-28, 2010 | Universe Today 2010
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The camera is equipped with a coronagraph that blocks out the light of the host star, allowing astronomers to view a much fainter planet.
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The camera is equipped with a coronagraph that blocks out the light of the host star, allowing astronomers to view a much fainter planet.
November 2008 2008
kad commented on the word coronagraph
A coronagraph is a telescopic attachment designed specifically to block out the harsh, direct light from a star, so that nearby objects can be resolved without burning out the telescope's optics.
November 14, 2008