from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Variant of coronagraph.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A telescope, fitted with an attachment that blocks out direct rays from the sun, used to study and photograph the corona of the sun
- n. The attachment used in such a telescope
from The Century Dictionary and Cyclopedia
- n. An instrument, first suggested and tried by Huggins for photographing the sun's corona during an eclipse, or in full sunlight, if possible.
Sorry, no etymologies found.
In the second case, support the instrumentation for TMT and GMT for a GPI-like project; put a well-corrected subaperture/vector vortex coronograph system on Keck, etc.
Once the twinkle was removed, the light from the star itself was blocked using the team's coronograph, an instrument that selectively masks out the star.
Sounds like a near-IR SNAP with a coronograph - a near-IR wide field "New Worlds Observer"?
Hubble's advanced camera for surveys was equipped with a coronograph, a disk-shaped device that blocks all of a star's brightest light.
Apparently a coronograph was used, which masked one star, so that pictures could be taken of planets which, in other conditions, would be invisible to the eye / lens.