Of smaller size but which remains imposing and of different design, let us quote also the radio-telescope of Nançay of >>
Intercelestial
Radioastronomy
It has been known since the discovery of Heinrich Hertz in 1887 that radio waves are of the same nature >>
Photography and its Limits
While the eye is sensitive only to the light perceived instantly, the silver medium (photo plate and films) that was >>
The Equatorial Mount
It is enough to have spent a few seconds on the eyepiece of a so-called azimuthal instrument, mounted on a >>
Solar Telescope
Around the world, about thirty observatories have dedicated at least one telescope to the study of the Sun. Given the >>
Technological Challenges
Since the manufacture of the 5 m diameter mirror of the Mount Palomar Observatory in 1939, because of their gross >>
Modern Times
At the turn of the twentieth century, Lorentz understood the futility of mechanical support to explain the propagation of the >>
