1) Coronograph 
In November 2008, NASA announced that a planet was directly observed orbiting the nearby star Fomalhaut. The planet could be seen clearly on images taken by Hubble`s Advanced Camera for Surveys` coronagraph in 2004 and 2006 . The dark area hidden by the coronagraph mask can be seen on the images, though a bright dot has been added to show where .....
instrument for viewing the corona of the sun
telescope that produces an artificial total eclipse of the Sun inside the instrument so that the Sun`s corona and prominences may be observed. It ... [4 related articles]
A device for studying the solar corona at any time of the day by creating an artificial eclipse, invented by Bernard Lyot in 1930. It consists of a high-quality refractor in whose focal plane a small disk occults the image of the Sun. The diameter of the disk exactly equals the diameter of the solar...
An instrument that allows study of the Sun's inner corona at times of non-eclipse.
A special telescope which blocks light from the Sun's disc, thus creating an artificial eclipse, in order to study its atmosphere.
A special telescope which blocks light from the disk of the Sun in order to study the faint solar atmosphere.
A type of telescope designed to view the Sun's Corona.
an instrument for observing and photographing the sun's corona, consisting of a telescope fitted with lenses, filters, and diaphragms that simulate an eclipse.