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Related to coronograph: spectroheliograph


Variant of coronagraph.
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Lyot invented the coronograph, (8) and since then the corona had been observed without waiting for total eclipses that only last for a few minutes.
With the advent of the Lyot coronograph in 1930, the study of the solar corona outside of total eclipses became possible [19].
Project 1640's sensors can distinguish between the residual starlight that sneaks through the coronograph and the light from planets, allowing astronomers to filter out background starlight more effectively and tease out exoplanet glows.
The phenomena of the atmosphere of the planet in the shape of cusp extensions were seen in superb professional coronograph images supplied by Paolo Tanga, and in several visual observations.
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.