Also found in: Encyclopedia, Wikipedia.


also co·ro·no·graph  (kə-rō′nə-grăf′)
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.


(kəˈrəʊnəˌɡrɑːf; -ˌɡræf) or


(Astronomy) an optical instrument used to simulate an eclipse of the sun so that the faint solar corona can be studied
Mentioned in ?
References in periodicals archive ?
The system then blocks the star with a device called a coronagraph, revealing the exoplanet.
Soho - Solar and Heliographic Observatory - detected the solar flare on its Lasco coronagraph equipment, designed and built by Birmingham University, as it orbited one million miles from Earth.
The coronagraph has been used to block the light from the bright star (black circle) allowing the search for the dim glow Of the planet HR 8799b.
9) Twenty-three years later the distinguished French astronomer Bernard Lyot (1897-1952), who perfected the coronagraph, clearly saw Mercury in coronal projection, despite interference from clouds, at separations from the solar limb of one to 2.
lt;em>The video clip shows the large X2 flare seen by Solar Dynamics Observatory (SDO) in extreme ultraviolet light on February 15, 2011, has been enlarged and superimposed on a video of SOHO's C2 coronagraph for the same period.
To analyze this solar cycle set, NRL researchers have studied the uniquely long-term and comprehensive CME observations obtained by the National Aeronautics and Space Administration (NASA) sponsored and NRL's SSD-developed and -operated Large Angle Spectrometric Coronagraph (LASCO) coronagraph aboard the NASA-European Space Agency (ESA) Solar and Heliospheric Observatory (SOHO) mission.
Shri Narayanasami said Several exciting missions in Space Science and Planetary Exploration have been planned in the near future including Chandrayn-2, with a lander and a rover intended for in-situ investigations of the Lunar Surface; multi-wavelength Astronomy observatory satellite ASTROSAT-1 for observation of celestial objects covering optical, UV and X-ray bands and India s first space- borne solar coronagraph mission ADITYA-1 for studies on coronal mass ejections.
Pasachoff's team at Maui's Haleakala Observatory snapped some 660,000 images of the transit using a coronagraph, a special telescope that blocks part of the sun's brightness.
Scientists use this kind of picture, called a coronagraph, in which the sun is obscured, to better see the sun's atmosphere, the corona.
The tenuous outermost part of the atmosphere of the sun extending for millions of miles from its surface, containing very highly ionized atoms of iron, nickel, and other gases that indicate a temperature of millions of degrees, and appearing to the naked eye as a pearly gray halo around the moon's black disk during a total eclipse of the sun but observable at other times with a coronagraph
They were taken using LASCO - Large Angle Spectrometric Coronagraph - developed by experts from Birmingham University, the Naval Research Laboratory in Washington DC, the Max Planck Institute in Germany and LAS in Marseilles, France.
By using a coronagraph, which is a telescope attachment that blocks out the bright light given off by a star, astronomers spotted something orbiting Alcor.