1950s
- 1957 - USSR - Sputnik 1 - Success
- 1957 - USSR - Sputnik 2 - Success
- 1957 - USA - Vanguard TV3 - Failed
- 1958 - USA - Explorer 1 - Success
- 1958 - USA - Vanguard 6.5in Satellite 2 - Failed
- 1958 - USA - Explorer 2 - Failed
- 1958 - USA - Vanguard 1 - Success
- 1958 - USA - Explorer 3 - Success
- 1958 - USSR - ISZ D-1 No. 1 - Failed
- 1958 - USA - Vanguard 20in X-ray 1 - Failed
- 1958 - USSR - Sputnik 3 - Success
- 1958 - USA - Vanguard 20in Lyman-Alpha 1 - Failed
Read more about this topic: Timeline Of Artificial Satellites And Space Probes