coronagraph
1
9.9
- noun
- /ˈkɔːrəˌnəɡræf/
- Specialized
- Coronagraphs are built with special attention to low scattering of light, since their purpose is not to gather a lot of light but to prevent the strong solar radiation from being scattered about within the telescope.
- coronagraph telescope
- coronagraph blocks light
Examples
-
Several manned and unmanned spacecraft have used coronagraphs to photograph the corona hour by hour in visible light.
Academic text (1991) -
In 1984, space shuttle astronauts repaired the Solar Maximum Mission (SMM), a spacecraft bearing a coronagraph that was launched in 1980 but failed a few months later.
Academic text (1991) -
An alternative would be to use a coronagraph, which is the same general idea, but having the mask inside your telescope.
-
Altrock used an instrument called a coronagraph, which artificially blocks the light from the Sun.
Academic text (1992) -
Special telescopes called coronagraphs study the corona from such sites.
Academic text (1991) -
The Institute, equipped with a number of unique instruments such as the Solar Vacuum Tower Telescope, the Horizontal Solar Telescope, a coronagraph, and the Solar Radiointerferometer, is as a whole dedicated to research on the Sun and its influence on the Earth.
Academic text (1999) -
The SMM coronagraph hid not only the solar photosphere but also an extra 3/4 of a solar radius, so the inner corona was also masked.
Academic text (1991) -
This image of the area around DG Taurus, a young, variable protostar in the late stages of formation, was obtained using a coronagraph, which blocks the light from the central star, allowing astronomers to see faint structure close to the star.
Academic text (1994) -
The coronagraph blocks the Sun's light, making it possible to observe solar flares.
-
Astronomers use a coronagraph to study the Sun's corona and discover new features.
Surface Forms
Morphology
Etymology
The word coronagraph comes from corona meaning 'crown' and the ending -graph meaning 'to record', the same ending as in photograph. A coronagraph is a tool that 'records' the star's 'crown', the faint ring of light around it, by blocking the bright center so we can see faint objects nearby.