Mayall Telescope is a reflector, not refractor, telescope. That
means a series of curved mirrors rather than lenses focus light
into an image.
4-meter mirror is a solid piece of quart glass ground into a
parabolic, or concave, shape. The secondary mirror's shape is
convex or hyperbolic, opposite that of the primary.
a Cassegrain telescope, the secondary mirror reflects light through
a hole in the center of the main, objective mirror where the
image is formed. Here, attached to the bottom of the telescope
will be a light detector, an electronic camera, or a spectrograph.
arrangement of mirrors is named for its inventor, 18th century
French optician Guillame Cassegrain.
that will determine an astronomer's salary include formal education
and work experience.
much money do astronomers make?
here for the answer.