AstronautAtlas
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Program archive
Heliophysics is explored here through 49 archived missions, from IMP-1 through ESCAPADE, with the program’s spacecraft, people, milestones, and source-backed history connected along the way.
Explore this program
Choose a path through the Heliophysics archive.
Follow every archived flight from the earliest development test through the program’s latest flown mission, with its defining milestones and mission hardware connected along the way.
All 49 flown and non-flight archive records arranged chronologically.
Launch corridor
49 flights and tests compressed into 3 expandable arcs.
November 27, 1963IMP-1001
September 5, 1964OGO-1002
October 4, 1964IMP-2003
February 16, 1965Pegasus 1004
May 25, 1965Pegasus 2005
May 29, 1965IMP-3006
July 30, 1965Pegasus 3007
October 14, 1965OGO-2008
December 16, 1965Pioneer 6009
June 7, 1966OGO-3010
July 1, 1966AIMP-1011
August 17, 1966Pioneer 7012
May 24, 1967IMP-4013
July 19, 1967AIMP-2014
July 28, 1967OGO-4015
December 13, 1967Pioneer 8016
March 4, 1968OGO-5017
November 8, 1968Pioneer 9018
June 5, 1969OGO-6019
June 21, 1969IMP-5020
August 27, 1969Pioneer E021
March 13, 1971IMP-6022
September 23, 1972IMP-7023
October 26, 1973IMP-8024
December 10, 1974Helios 1025
January 15, 1976Helios 2026
October 22, 1977ISEE-1027
October 22, 1977ISEE-2028
August 12, 1978ISEE-3029
August 3, 1981Dynamics Explorer 1030
August 3, 1981Dynamics Explorer 2031
August 16, 1984AMPTE Charge Composition Explorer032
August 16, 1984AMPTE Ion Release Module033
August 16, 1984AMPTE United Kingdom Subsatellite034
November 1, 1994Wind035
December 2, 1995Solar and Heliospheric Observatory036
February 24, 1996Polar037
August 25, 1997Advanced Composition Explorer038
April 2, 1998Transition Region and Coronal Explorer039
October 26, 2006STEREO040
February 17, 2007THEMIS-ARTEMIS041
April 25, 2007Aeronomy of Ice in the Mesosphere042
October 19, 2008Interstellar Boundary Explorer043
February 11, 2010Solar Dynamics Observatory044
August 30, 2012Van Allen Probes045
March 12, 2015Magnetospheric Multiscale046
August 12, 2018Parker Solar Probe047
July 23, 2025TRACERS048
November 13, 2025ESCAPADE049