RvdtG schrieb am 31.10.2022 12:44:
Slava Asovstal schrieb am 31.10.2022 12:31:
RvdtG schrieb am 31.10.2022 11:27:
Slava Asovstal schrieb am 31.10.2022 10:48:
was meinst du wozu man Hubble gebaut hat?
Als Weltraumteleskop zur Beobachtung "nach Außen".
Es war aber deutlich billiger, weil Militär und Gehiemdienste die Technik vorher schon für Beobachtung "nach Innen" im Einsatz hatte.
KH-11s are believed to resemble the Hubble Space Telescope in size and shape, as they were shipped in similar containers. Their length is believed to be 19.5 meters, with a diameter of up to 3 meters (120 in).[5][22] A NASA history of the Hubble,[23] in discussing the reasons for switching from a 3-meter main mirror to a 2.4-meter (94 in) design, states: "In addition, changing to a 2.4-meter mirror would lessen fabrication costs by using manufacturing technologies developed for military spy satellites".
https://en.wikipedia.org/wiki/KH-11_KENNEN#Size_and_mass
https://en.wikipedia.org/wiki/KH-11_KENNEN#Block_I
Block I refer to the original KH-11 satellite, of which five were launched between 19 December 1976 and 17 November 1982.
https://en.wikipedia.org/wiki/Hubble_Space_Telescope
The Hubble Space Telescope (...)was launched into low Earth orbit in 1990
Schon klar, erst kam das Militär, dann die NASA. Hab mich nur schlecht am Anfang ausgedrückt.