Newtonian telescope secondary mirror. This design reduces the size and cost of the telescope with a shorter overall telescope tube length (with the corrector extending the focal length in a "telephoto" type layout) combined with a less costly spherical mirror. Commercially produced versions of this design have been noted to be optically compromised due to the difficulty of producing a correctly shaped sub-aperture corrector in a telescope targeted at the inexpensive end of the telescope market. Newtonian telescope The Newtonian telescope, also called the Newtonian reflector or just the Newtonian, is a type of reflecting telescope invented by the English scientist Sir
The Galilean Satellites Deneb, Capella, Beta Aquilae, Ross 128, and Sol (the Latin name for our own sun). The track names on disc one are all French phrases (apart from "Europa", since "Absent" is the same in English and in French). The Galilean Satellites The Galilean Satellites is the first studio album by American post-metal band Rosetta, released in 2005 on Translation Loss Records. The album is two discs long and the track lengths on each disc correspond to each other, indicating that the band intended the albums to be played at the same time. Disc one is in a post-metal style while