Encyclopedia > Ritchey-Chrétien telescope

Article Content

Ritchey-Chrétien telescope

Ritchey-Chrétien is a type of astronomical telescope. It is a specialized Cassegrain[?] reflector with the advantage that it is coma free. This is why almost every professional reflector telescope in the world is of the Ritchey-Chrétien design. It was invented by George Willis Ritchey and Henri Chrétien in the early 1910's.

All Wikipedia text is available under the terms of the GNU Free Documentation License

Search Encyclopedia

Search over one million articles, find something about almost anything!

Featured Article

Photosynthesis

... H2O + 2S Some of these produce globules of sulfur as a waste product instead of oygen, while others further oxidize it, producing sulfates. In general, photosynthesis ...