Operational
Other*
US
USSR/Russia
2016
2010
2000
1990
1980
1970
1960
Mission
failures
Flybys
Landers
Orbiters
Mars
3**
Viking 1
and 2
Curiosity
Spirit and
Opportunity
Orbiter/lander
arrives October
Sojourner rover
Mariner 4
Mariner 9
*By launch date order: Japan, ESA, China, India, ESA.
**Operated for 20 seconds
Operational
Other*
US
USSR/Russia
2016
2010
2000
1990
1980
1970
1960
Mission
failures
Flybys
Landers
Orbiters
Mars 3**
Viking 1 and 2
Curiosity
Spirit and
Opportunity
Orbiter/lander arrives October
Sojourner rover
Mariner 4
Mariner 9
*By launch date order: Japan, ESA, China, India, ESA. **Operated for 20 seconds