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On April 21 in Space History

1949 April 21 - . Launch Site: Wallops Island. Launch Vehicle: Deacon.
1951 April 21 - .
1953 April 21 - . Launch Site: Hammaguira. Launch Complex: Hammaguira Bechar. Launch Vehicle: Veronique.
1955 April 21 - . LV Family: Atlas.
1955 April 21 - . 15:58 GMT - . Launch Site: Holloman. Launch Complex: Holloman A. LV Family: Aerobee. Launch Vehicle: Aerobee Hi.
1958 April 21 - . Launch Vehicle: Thor.
1958 April 21 - .
1959 April 21 - . 01:05 GMT - . Launch Site: Holloman. Launch Complex: Holloman A. LV Family: Aerobee. Launch Vehicle: Aerobee 150.
1960 April 21 - .
1960 April 21 - . 10:35 GMT - . Launch Site: Woomera. Launch Complex: Woomera LA2. Launch Pad: LA2 SL. Launch Vehicle: Skylark.
1960 April 21 - . 15:00 GMT - . Launch Site: Eglin. LV Family: Aerobee. Launch Vehicle: Aerobee 150.
1960 April 21 - . 20:55 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral LC15. LV Family: Titan. Launch Vehicle: Titan I.
1961 April 21 - . Launch Site: Baikonur. Launch Complex: Baikonur LC41/4. Launch Pad: LC41/pad?. Launch Vehicle: R-16. FAILURE: Failure.
1961 April 21 - . 00:12 GMT - . Launch Site: Wallops Island. LV Family: Asp. Launch Vehicle: Nike Asp. FAILURE: Failure.
1961 April 21 - . 02:26 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC51. LV Family: R-9. Launch Vehicle: R-9A.
1961 April 21 - . 09:34 GMT - . Launch Site: Wallops Island. LV Family: Asp. Launch Vehicle: Nike Asp. FAILURE: Failure.
1961 April 21 - . 09:39 GMT - . Launch Site: Wallops Island. LV Family: Asp. Launch Vehicle: Nike Asp.
1961 April 21 - . 12:00 GMT - . Launch Site: Wallops Island. LV Family: Aerobee. Launch Vehicle: Aerobee 150A.
1961 April 21 - . 18:05 GMT - . Launch Site: Edwards. Launch Complex: Hidden Hills DZ. Launch Pad: Edwards RW04/22. Launch Platform: NB-52 003. FAILURE: Three hardware problems during flight..
1962 April 21 - .
1962 April 21 - .
1964 April 21 - . 06:15 GMT - . Launch Site: Johnston Island. Launch Complex: Johnston Island LE2. LV Family: Thor. Launch Vehicle: Thor DSV-2J.
1964 April 21 - . 18:50 GMT - . Launch Site: Vandenberg. Launch Complex: Vandenberg SLC2E. LV Family: Thor. Launch Vehicle: Thor Ablestar. FAILURE: Failure. Failed Stage: U.
1964 April 21 - . 23:56 GMT - . Launch Site: Fort Churchill. LV Family: Black Brant. Launch Vehicle: Black Brant III.
1965 April 21 - . 11:02 GMT - . Launch Site: Woomera. Launch Complex: Woomera LA5B. Launch Pad: LA5B?. Launch Vehicle: Black Knight.
1966 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 643. LV Family: Polaris. Launch Vehicle: Polaris A3.
1966 April 21 - . Launch Site: Baikonur. Launch Vehicle: UR-100. FAILURE: Failure.
1966 April 21 - . 00:06 GMT - . Launch Site: Woomera. Launch Complex: Woomera LA2. Launch Pad: LA2 SL. LV Family: Skylark. Launch Vehicle: Skylark 2.
1966 April 21 - . 02:10 GMT - . Launch Site: Tonopah. LV Family: Deacon. Launch Vehicle: Nike Apache.
1966 April 21 - . 11:25 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150.
1966 April 21 - . 16:00 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 643. LV Family: Polaris. Launch Vehicle: Polaris A3.
1966 April 21 - . 16:30 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 643. LV Family: Polaris. Launch Vehicle: Polaris A3.
1967 April 21 - . Launch Site: Malmstrom AFB. LV Family: Minuteman. Launch Vehicle: Minuteman 2, Minuteman 1A.
1967 April 21 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF03. LV Family: Minuteman. Launch Vehicle: Minuteman 1B.
1967 April 21 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF22. LV Family: Minuteman. Launch Vehicle: Minuteman 2.
1968 April 21 - .
1968 April 21 - . 04:20 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. Launch Pad: LC1 or LC31. LV Family: R-7. Launch Vehicle: Molniya 8K78M.
1969 April 21 - . LV Family: Shuttle. Launch Vehicle: Space Shuttle.
1969 April 21 - .
1969 April 21 - . 13:06 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. Launch Vehicle: MR-12.
1969 April 21 - . 15:26 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. Launch Vehicle: MR-12.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Vandenberg. Launch Complex: Vandenberg LF24. LV Family: Minuteman. Launch Vehicle: Minuteman 2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 608. LV Family: Polaris. Launch Vehicle: Polaris A2.
1970 April 21 - . 06:01 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar V-2. Launch Vehicle: MR-12.
1970 April 21 - . 20:42 GMT - . Launch Site: South Uist. Launch Vehicle: Petrel.
1971 April 21 - . LV Family: Shuttle. Launch Vehicle: Space Shuttle.
1971 April 21 - .
1971 April 21 - . Launch Site: Kwajalein. Launch Complex: Kwajalein Meck. Launch Vehicle: Spartan ABM.
1971 April 21 - . 18:59 GMT - . Launch Site: Kiruna. Launch Vehicle: Petrel.
1971 April 21 - . 21:42 GMT - . Launch Site: Kiruna. Launch Vehicle: Petrel.
1971 April 21 - . 23:03 GMT - . Launch Site: Kiruna. Launch Vehicle: Petrel.
1972 April 21 - . LV Family: Shuttle. Launch Vehicle: Space Shuttle.
1972 April 21 - . 11:59 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC133/1. LV Family: R-12. Launch Vehicle: Kosmos 11K63.
1972 April 21 - . 15:13 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC35. LV Family: Aerobee. Launch Vehicle: Aerobee 150.
1972 April 21 - . 16:47 GMT - .
1975 April 21 - . 08:11 GMT - . Launch Site: Thumba. LV Family: Belier. Launch Vehicle: Centaure 2B.
1975 April 21 - . 09:07 GMT - . Launch Site: Fort Churchill. LV Family: Tomahawk. Launch Vehicle: Paiute Tomahawk.
1975 April 21 - . 09:07 GMT - . Launch Site: Fort Churchill. LV Family: Tomahawk. Launch Vehicle: Paiute Tomahawk.
1975 April 21 - . 09:12 GMT - . Launch Site: Fort Churchill. LV Family: Tomahawk. Launch Vehicle: Paiute Tomahawk.
1975 April 21 - . 17:30 GMT - . Launch Site: Thumba. LV Family: Belier. Launch Vehicle: Centaure 2B.
1976 April 21 - . 10:00 GMT - . Launch Site: White Sands. LV Family: Aerobee. Launch Vehicle: Aerobee 200A.
1976 April 21 - . 18:33 GMT - . Launch Site: Wallops Island. LV Family: Viper. Launch Vehicle: Viper-Dart.
1977 April 21 - . 17:00 GMT - . Launch Site: White Sands. LV Family: Aerobee. Launch Vehicle: Aerobee 170.
1978 April 21 - . LV Family: Shuttle. Launch Vehicle: Space Shuttle.
1978 April 21 - . LV Family: Peacekeeper, Trident.
1978 April 21 - . LV Family: Minuteman. Launch Vehicle: Minuteman 3.
1978 April 21 - . LV Family: Shuttle, Titan. Launch Vehicle: Titan 34D, Shuttle.
1978 April 21 - .
1978 April 21 - . 05:29 GMT - . Launch Pad: Atlantic Ocean, 38.0 N x 75.0 W. Launch Platform: VISE. Launch Vehicle: MR-12.
1978 April 21 - . 06:26 GMT - . Launch Pad: Atlantic Ocean, 38.0 N x 75.0 W. Launch Platform: VISE. Launch Vehicle: MR-12.
1978 April 21 - . 07:52 GMT - . Launch Pad: Atlantic Ocean, 38.0 N x 75.0 W. Launch Platform: VISE. Launch Vehicle: MR-12.
1978 April 21 - . 17:40 GMT - . Launch Pad: Atlantic Ocean, 38.0 N x 75.0 W. Launch Platform: VISE. Launch Vehicle: MR-12.
1978 April 21 - . 18:30 GMT - . Launch Pad: Atlantic Ocean, 38.0 N x 75.0 W. Launch Platform: VISE. Launch Vehicle: MR-12.
1979 April 21 - . 10:10 GMT - . Launch Site: White Sands. LV Family: Black Brant. Launch Vehicle: Black Brant 8C.
1980 April 21 - . 21:47 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 656. LV Family: Polaris. Launch Vehicle: Poseidon C3.
1980 April 21 - . 21:47 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 656. LV Family: Polaris. Launch Vehicle: Poseidon C3.
1980 April 21 - . 21:47 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 656. LV Family: Polaris. Launch Vehicle: Poseidon C3.
1980 April 21 - . 21:48 GMT - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 656. LV Family: Polaris. Launch Vehicle: Poseidon C3.
1981 April 21 - . 03:45 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC90/19. Launch Pad: LC90/pad?. LV Family: R-36. Launch Vehicle: Tsiklon-2.
1982 April 21 - . 01:40 GMT - . Launch Site: Kapustin Yar. Launch Complex: Kapustin Yar LC107/1. LV Family: R-14. Launch Vehicle: Kosmos 11K65M.
1982 April 21 - . 09:15 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. Launch Pad: LC1 or LC31. LV Family: R-7. Launch Vehicle: Soyuz-U.
1987 April 21 - . 15:14 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC1. LV Family: R-7. Launch Vehicle: Soyuz-U2.
1990 April 21 - . 10:15 GMT - . Launch Site: White Sands. Launch Complex: White Sands LC36. LV Family: Black Brant. Launch Vehicle: Black Brant IX.
1993 April 21 - . 00:23 GMT - . Launch Site: Plesetsk. Launch Complex: Plesetsk LC43/4. LV Family: R-7. Launch Vehicle: Molniya 8K78M.
1995 April 21 - . 01:44 GMT - . Launch Site: Kourou. Launch Complex: Kourou ELA2. LV Family: Ariane. Launch Vehicle: Ariane 40.
1995 April 21 - . 15:04 GMT - . Launch Site: White Sands. Launch Vehicle: THAAD.
1996 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 738. LV Family: Trident. Launch Vehicle: Trident D-5.
1996 April 21 - . Launch Site: Cape Canaveral. Launch Complex: Cape Canaveral ETR. Launch Platform: SSBN 738. LV Family: Trident. Launch Vehicle: Trident D-5.
1997 April 21 - . 11:59 GMT - . Launch Site: Gando. Launch Complex: Gran Canaria DZ. Launch Pad: 27.0 N x 15.3 W. Launch Platform: L-1011. LV Family: Pegasus. Launch Vehicle: Pegasus XL.
1998 April 21 - .
1998 April 21 - .
1998 April 21 - .
1999 April 21 - . 04:59 GMT - . Launch Site: Baikonur. Launch Complex: Baikonur LC109. Launch Pad: LC109/95. LV Family: R-36M. Launch Vehicle: Dnepr.
2001 April 21 - .
2001 April 21 - .
2006 April 21 - .
2007 April 21 - . 12:31 GMT - .
2008 April 21 - .
2013 April 21 - . 08:00 GMT - . Launch Site: White Sands. LV Family: Black Brant. Launch Vehicle: Black Brant IX.
2013 April 21 - . 21:00 GMT - . Launch Site: Wallops Island. Launch Complex: Wallops Island LP0A. LV Family: Antares LV. Launch Vehicle: Antares 110.

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