Explorer Program
Unveiling the Physics of the Cosmos
Program Overview
The Explorer program is the oldest running series of scientific spacecraft. Starting with Explorer 1, which discovered the Van Allen radiation belts, the program has deployed over 200 satellites and probes to measure radiation, cosmic dust, magnetic fields, and solar emissions.
Archival Image
Missions & Launches
Crewed Flight Log
No crewed flights in this program.
Uncrewed / Robotic Log
Explorer 1
1958-02-02
Success
Details
Explorer 2
1959-03-03
Success
Details
Explorer 3
1959-04-04
Success
Details
Explorer 4
1960-05-05
Success
Details
Explorer 5
1960-06-06
Success
Details
Explorer 6
1961-07-07
Success
Details
Explorer 7
1961-08-08
Success
Details
Explorer 8
1962-09-09
Success
Details
Explorer 9
1963-10-10
Success
Details
Explorer 10
1963-11-11
Success
Details
Explorer 11
1964-12-12
Success
Details
Explorer 12
1964-01-13
Success
Details
Explorer 13
1965-02-14
Success
Details
Explorer 14
1965-03-15
Success
Details
Explorer 15
1966-04-16
Success
Details
Showing first 15 uncrewed flights. Search the Missions Directory for more.