According to Bernard Lyot
, this polarization did not extend beyond ~6' from the limb, increased rapidly as observations were made towards the Sun, and remained constant within ~3' of the solar surface .
7, Fowler at South Kensington, making use of the spectroscope, saw the planet projected on the chromosphere fully a minute before it reached the sun.' (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 2.6 arcminutes.
Then, in 1930, French astronomer Bernard Lyot
built a coronagraph: a special-purpose instrument that used a disk to block the Sun's direct light.
Its largest telescope, a two -metre-diameter instrument named after the French astronomer Bernard Lyot
, was installed in 1980.
Indeed, coronal structures have long been observed with white-light coronagraphs [25,26], an instrument invented by Bernard Lyot
This specialized solar telescope, developed in 1930 by French astronomer Bernard Lyot
, occults the Sun's disk with an opaque mask at the telescope's focal plane, while strategically placed baffles reduce scattered light within the instrument.
The project is named after Bernard Lyot
, the French astronomer who invented the coronagraph in the late 1920s and early 1930s in order to observe the Sun's corona without having to wait for a total solar eclipse.
Lille's unique viewer incorporates many of the features that the French astronomer Bernard Lyot
used in his coronagraph developed in the 1930s.
Since 1930 such celebrated observers as Bernard Lyot
, Henri Camichel, and Audouin Dollfus have used the observatory's telescopes for high-resolution imaging of the Moon and planets.