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O Connor - Bryan Daniel O'Connor - American Pilot Astronaut - NASA Group 9 - 1980 O Dell - Charles R O'Dell - American Scientist - O Keefe - Sean O'Keefe - American Manager - OŽLeary - Brian Todd O’Leary - American Scientist Astronaut - NASA Group 6 - 1967 OAO - Spacecraft - Astronomy - Visible - USA OAST-Flyer - Spacecraft - Technology - - USA Obachi - Suborbital Launch Site in Japan. Oberth - Hermann Julius Oberth - German German Scientist - Oberth - Sounding rocket - Germany Object 350 - Intercontinental cruise missile - Russia (Article Number) - See Burya Oblik - Spacecraft - Surveillance - Military - Russia - See Zenit-8 Obsolete - article - Flight into the Future Project Contest OBV - Anti-ballistic missile - USA Obzor - Spacecraft - Earth - Radarsat - Russia Ochoa - Dr Ellen Lauri Ochoa - American Mission Specialist Astronaut - NASA Group 13 - 1990 Ockels - Dr Wubbo Johannes Ockels - Dutch Payload Specialist Astronaut - ODERACS - Spacecraft - Military - Target - USA Odin - Spacecraft - Astronomy - Infrared - Sweden Odintsov - Mikhail Petrovich Odintsov - Russian Military Officer - Odishaw - Hubert "Hugh" Odishaw - American Scientist - Odle - Randy Thomas Odle - American Manned Spaceflight Engineer Astronaut - DoD Group 2 - 1982 Odyssey - Spacecraft - Communications - - USA Oefelein - William (Bill) Anthony Oefelein - American Pilot Astronaut - NASA Group 17 - 1998 Ofeq 1-2 - Spacecraft - Technology - - Israel Ofeq 3 - Spacecraft - Surveillance - Military - Israel Ofeq 5 - Spacecraft - Surveillance - Military - Israel Offeq - Space Project - Technology - Offutt AFB - ICBM Base in USA. OFO - Spacecraft - Biology - - USA OGCh - Spacecraft - Military - FOBS - Russia Oghab - Tactical ballistic missile - Iran OGO - Spacecraft - Earth - Magnetosphere - USA Ogthoff - Leopold Ogthoff - German Rocket engineer - Ohsumi - Spacecraft - Technology - - Japan OICETS - Spacecraft - Communications - - Japan - See Kirari OK-M - Spacecraft - Manned - Spaceplane - Russia OK-M1 - Spacecraft - Manned - Spaceplane - Russia OK-M2 - Spacecraft - Manned - Spaceplane - Russia Oka - - - See Tochka OKB-456 - rocket - See YaRD ICBM OKB-670 - rocket - See YaRD ICBM Okean - Space Project - Earth - Radarsat Okean-3 - Spacecraft - Earth - Radarsat - Ukraine - See Okean-O Okean-E - Spacecraft - Earth - Radarsat - Ukraine Okean-O - Spacecraft - Earth - Radarsat - Ukraine Okean-O1 - Spacecraft - Earth - Radarsat - Ukraine Okean-OE - Spacecraft - Earth - Radarsat - Ukraine Okhapkin - Sergei Osipovich Okhapkin - Russian Engineer - Okhotsimskiy - Dmitri Yevgenyevich Okhotsimskiy - Russian Scientist - Okhotsk - Suborbital Launch Site in operated by . Oko - Spacecraft - Early Warning - - Russia Oktant, Kobalt-M - Spacecraft - Surveillance - Military - Russia - See Yantar-4K1 Oleg - Spacecraft - Manned - Space Station - Russia - See Spektr Oleinik - Ivan Ivanovich Oleinik - Ukrainian Military Officer - Olejuik - Robert Olejuik - German Test pilot - Olivas - John Daniel 'Danny' Olivas - American Mission Specialist Astronaut - NASA Group 17 - 1998 Olsen - Gregory Hammond 'Greg' Olsen - American Scientist Cosmonaut - Olthof - Henk Olthof - Dutch Scientist - OlympicSat - Spacecraft - Technology - - China Olympus - Spacecraft - Technology - Communications - Europe OME - Rocket Engine - USA - N2O4/MMH propellant Omega - Spacecraft - Technology - - Russia Omelchenko - Svetlana Oktyabrevna Omelchenko (nee Yeremeyevna) - Russian Journalist Cosmonaut - Journalist Group - 1990 Omsk - ICBM Base in Russia. OMV - Spacecraft - Tug - - USA OMV Variable Thrust Engine - Rocket Engine - USA - N2O4/MMH propellant Ona - John Bernhardt Ona - American Engineer - One stage Orbital Space Truck - - - See OOST One stage Orbital Space Truck - SSTO orbital launch vehicle - USA - See OOST Onega - rocket - See Soyuz Ongaro - Franco Ongaro - Italian Payload Specialist Cosmonaut - Italian Space Agency Group - 1990 Onishchenko - Leonid Vasilyevich Onishchenko - Russian Military Officer - Onizuka - Ellison Shoji Onizuka - American Mission Specialist Astronaut - NASA Group 8 - 1978 Onufrienko - Yuri Ivanovich Onufrienko - Ukrainian Pilot Cosmonaut - Air Force Group 10 - 1989 Onyx - Spacecraft - Surveillance - Radarsat - USA - See Lacrosse OOST - SSTO orbital launch vehicle - USA OP - Spacecraft - Manned - Space Station - Russia OPd-56-39-22D - rocket - See Antares Opel - Fritz von Opel - German German Manager - Opel - Rocketplane - Germany OPI Methane Engine - Rocket Engine - USA - Lox/LCH4 propellant Opimz - Rudolph Opimz - German Engineer - Opitz - Rudolf Opitz - German Test pilot - Opportunity - Spacecraft - Planetary - Mars Lander - USA - See MER OPS - Spacecraft - Manned - Space Station - Russia - See Almaz OPS - Spacecraft - Manned - Space Station - Russia - See Almaz OPS OPS + TKS - Spacecraft - Manned - Space Station - Russia OPS-2 - Spacecraft - Manned - Space Station - Russia - See Almaz OPS-2 Optical Inter-Orbit Communications Engineering Test Satellite - Spacecraft - Communications - - Japan - See Kirari Orbcomm - Spacecraft - Technology - Communications - USA Orbcomm - Space Project - Technology - Comsat Orbiscal - Spacecraft - Earth - Ionosphere - USA Orbital Boost Vehicle - Anti-ballistic missile - USA - See OBV Orbital Escape System - Spacecraft - Manned - Bailout - USA Orbital Express Astro - Spacecraft - Technology - Rendezvous - Orbital Manoeuvring Vehicle - Spacecraft - Tug - - USA - See OMV Orbital Re-entry Experiment Vehicle - Spacecraft - Technology - RV - Japan - See OREX Orbital Scanner - Spacecraft - Technology - - USA Orbital Test Satellite - Spacecraft - Technology - Communications - Europe - See OTS Orbital Transfer Vehicle - Spacecraft - Tug - - USA - See OTV Orbital Vehicle - Spacecraft - Manned - Spacecraft - India Orbital Workshop - Spacecraft - Manned - Space Station - USA Orbitalnky Poyas - Orbital Belt - Spacecraft - Manned - Space Station - Russia - See OP Orbitec Methane Engine - Rocket Engine - USA - Lox/LCH4 propellant Orbiting and Retrievable Far and Extreme UV Spectrometer - Spacecraft - Astronomy - Ultraviolet - USA - See ORFEUS Orbiting Astronomical Observatory - Spacecraft - Astronomy - Visible - USA - See OAO Orbiting Frog Otolith - Spacecraft - Biology - - USA - See OFO Orbiting Geophysical Laborator - Spacecraft - Earth - Magnetosphere - USA - See OGO Orbiting Satellite Carrying Amateur Radio - Spacecraft - Communications - Amateur Radio - USA - See Oscar Orbiting Work Shop - Spacecraft - Manned - Space station module - - See Skylab OWS Orbus - Target missile - USA Orbus 1 - Rocket Engine - USA - Solid propellant Orbus 21 - Rocket Engine - USA - Solid propellant - See SRM-1 Orbus 6 - Rocket Engine - USA - Solid propellant - See SRM-2 Orbview - Spacecraft - Surveillance - Civilian - USA Orbview-2 - Spacecraft - Surveillance - Civilian - USA Ordzhonikidze - IRBM Base in Georgia operated by Russia. Orel - Winged orbital launch vehicle - Russia Oreol - Spacecraft - Earth - Magnetosphere - Ukraine - See DS-U2-GKA Oreol-3 - Spacecraft - Technology - - Ukraine - See AUOS Oreste - Rocket Engine - France - Solid propellant OREX - Spacecraft - Technology - RV - Japan ORFEUS - Spacecraft - Astronomy - Ultraviolet - USA Orient Express - Winged orbital launch vehicle - USA - See X-30 Oriflamme - Winged orbital launch vehicle - France Oriole - Rocket Engine - USA - Solid propellant Orion - Spacecraft - Manned - Spacecraft - USA Orion - Spacecraft - Surveillance - Military - Russia - See Zenit-4MT Orion - Rocket Engine - USA - Solid propellant Orion - Nuclear-powered orbital launch vehicle - USA Orion - Space Project - Communications - Orion - article - Project Orion: Its Life, Death, and Possible Rebirth Orion 38 - Rocket Engine - USA - Solid propellant - See Pegasus-3 Orion 50 - Rocket Engine - USA - Solid propellant - See Pegasus-2 Orion 50S - Rocket Engine - USA - Solid propellant - See Pegasus-1 Orion 50SXLG - Rocket Engine - USA - Solid propellant Orion CM - Spacecraft - Manned - Spacecraft Module - Orion LAS - Spacecraft - Manned - Spacecraft Module - Orion Mars - Spacecraft - Manned - Mars Expedition - Orion SA - Spacecraft - Manned - Spacecraft Module - Orion SM - Spacecraft - Manned - Spacecraft Module - Orion Sounding Rocket - Sounding rocket - - See Hawk Orion-1 - Rocket Engine - Argentina - Solid propellant Orion-1 - rocket - See IIAE Orion Orion-2 - Rocket Engine - Argentina - Solid propellant Orion-2 - rocket - See IIAE Orion Orizont - Spacecraft - Manned - Spacecraft - Romania Orlan - Spacecraft - Manned - Space Suits - Russia Orlets - Spacecraft - Surveillance - Military - Russia - See Yantar-6K Orlets - Space Project - Surveillance - Military Orlets-1 - Spacecraft - Surveillance - Military - Russia Orlets-1 - Spacecraft - Surveillance - Military - Russia - See Yantar-4K1 Orlets-2 - Spacecraft - Surveillance - Military - Russia Orsted - Spacecraft - Earth - Magnetosphere - Denmark Oryol V3 - Spacecraft - Manned - Spaceplane - Russia - See OK-M1 OS - Spacecraft - Manned - Space Station - Russia OS - Spacecraft family OS-1 (1965) - Spacecraft - Manned - Space Station - Russia OS-1 (1969) - Spacecraft - Manned - Space Station - Russia OS-1 Lunar - Spacecraft - Manned - Lunar Orbiter - Russia OS-1962 - Spacecraft - Manned - Space Station - Russia Oscar - Spacecraft - Communications - Amateur Radio - USA Oscar - Space Project - Communications - Amateur Radio Osi - Albert Osi - German Engineer - OSO - Spacecraft - Solar - - USA OSOAVIAKHIM - Spacecraft - Manned - Balloon - Russia Ostashev - Yevgeni Ilich Ostashev - Russian Military Officer - Ostrander - Don Richard Ostrander - American Manager - Osumi - Spacecraft - Technology - - Japan Oswald - Stephen Scott Oswald - American Pilot Astronaut - NASA Group 11 - 1985 Otovyannaya - ICBM Base in Russia. - See Yasnaya/Oloynyaya OTR-22 - - - See Temp-S OTR-23 - - - See Tochka Otrag - Rocket Engine - Germany - N2O4/Kerosene propellant Otrag - Low cost orbital launch vehicle - Germany OTRAG Libya - Suborbital Launch Site in Libya operated by Germany. - See Tawiwa OTRAG Zaire - Suborbital Launch Site in Congo operated by Germany. - See Kapani Tonneo OTS - Spacecraft - Technology - Communications - Europe Otsek komponentov dozapravki - Spacecraft - Manned - Spacecraft Module - - See Progress M OKD Otsek komponentov dozapravki - Spacecraft - Manned - Spacecraft Module - - See Progress OKD Ottobrunn 300N - Rocket Engine - Germany - Lox/LH2 propellant OTV - Spacecraft - Tug - - USA Outpost - Spacecraft - Manned - Space Station - USA Outpost on the Moon - Spacecraft - Manned - Lunar Base - USA Ouyang Ziyuan - Ouyang Ziyuan - Chinese Scientist - OV-099 - Spacecraft - Manned - Spaceplane - USA - See Challenger OV-101 - Spacecraft - Manned - Spaceplane - USA - See Enterprise OV-102 - Spacecraft - Manned - Spaceplane - USA - See Columbia OV-103 - Spacecraft - Manned - Spaceplane - USA - See Discovery OV-104 - Spacecraft - Manned - Spaceplane - USA - See Atlantis OV-105 - Spacecraft - Manned - Spaceplane - USA - See Endeavour OV1 - Spacecraft - Earth - Magnetosphere - USA OV2 - Spacecraft - Earth - Magnetosphere - USA OV3 - Spacecraft - Earth - Magnetosphere - USA OV4 - Spacecraft - Technology - - USA OV5 - Spacecraft - Earth - Magnetosphere - USA Ovchinin - Aleksei Nikolaevich Ovchinin - Pilot Cosmonaut - Air Force Group 14 - 2006 Overberg - Orbital Launch Site in South Africa. Overhage - Carl FJ Overhage - American Manager - Overmyer - Robert Franklin (Bob) Overmyer - American Pilot Astronaut - USAF MOL Group 2 - 1966, NASA Group 7 - 1969 Owl - Spacecraft - Earth - Ionosphere - USA Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2008 except where otherwise noted.