User:Wikibob/Images

Public Domain or GFDL Images

Images from Wikipedeans of other languages

 * Telescope images from de:Benutzer:ArtMechanic/Bildergalerie
 * [[Image:Foucault-Test 1.png|thumb|centre|300px|In 1859 [[Léon Foucault|Jean Bernard Léon Foucault]] described his Foucault tester still used in Amateur_telescope_making]]
 * [[Image:Foucault-Test 2.jpg|thumb|centre|300px|Foucault test appearance]]
 * [[Image:Radioteleskop Effelsberg.jpg|centre|thumbnail|292px|100m [[Radio telescope]] at Effelsberg]]
 * [[Image:Cassegrain-Telescope.png|thumb|centre|Cassegrain-Telescope]]
 * [[Image:Gregory-Telescope.png]]
 * [[Image:Maksutov-Telescope]]
 * [[Image:Maksutov-MENISCAS_180.jpg]]
 * [[Image:Newton-Telescope.png]]
 * [[Image:Ritchey-Chretien-Cassegrain-Teleskop.png|centre|thumbnail|364px|Light path of a Ritchey-Chrétien-Cassegrain-Telescope]]
 * [[Image:Schmidt-Cassegrain-Telescope.png|centre|thumbnail|364px|Light path of a Schmidt-Cassegrain-Telescope]]
 * [[Image:Schmidt-Telescope.png|centre|thumbnail|377px|Light path of a  Schmidt-Telescope]]
 * [[Image:Schwarzschild-Telescope.png|thumb|377px|centre|Light path of a Schwarzschild-Telescope]]

Public domain images