Hans Lippershey discovers that holding two lenses up bring objects closer.
Galileo built a telescope,first telescope capable of being used for astronomy.
Johannes Kepler switches from a concave eyepiece to a convex eyepiece.
James Gregory designed a telescope using two mirrors (still used today).
Newton produces the first successful reflecting telescope.
Cassegrain proposed a similar design using a convex secondary.
So he constructed a telescope which was 140 feet long.
Johannus saw that the longer the telescope was the closer the colored dots.
Chester Moor Hall develops an achromatic lens.
James Short invents the first parabolic and elliptic, distortionless mirror.
Historians claim that the triplet was introduced in 1765 by Peter Dolland.
with a four-foot diameter mirror.
Sir William H constructs a forty foot long telescope,
H. Dennis Taylor, designed and patented the now famous, triplet design.
Edwin Hubble invented the Hubble space telescope.
The hubble space telescopewas lifted into orbit by the space shuttle.
The twin mirrored large binocular telescope saw first light.