Space mission · NASA
Opportunity (MER-B)
ExplorationCompletedLaunched 2003-07-07
Mission overview
Opportunity was the twin of Spirit, exploring Meridiani Planum for nearly 15 years.
Outcome & discoveries
Found hematite 'blueberries' and strong evidence that liquid water once flowed on Mars.
- ★Evidence of ancient liquid water at Meridiani Planum
Mission profile
Spacecraft
Knowledge connections
- Operated byNASA
- Part of programMars Exploration Program
- Mission targetMars
- Mission includesOpportunity
Related missions
| Mission | Type | Agency | Launch | Status |
|---|---|---|---|---|
| Spirit (MER-A)Mars | Rover | NASA | 2003-06-10 | Completed |
| Mars Science Laboratory (Curiosity)Mars | Rover | NASA | 2011-11-26 | Active |
| MAVENMars | Orbiter | NASA | 2013-11-18 | Active |
| Mars 2020 (Perseverance)Mars | Rover | NASA | 2020-07-30 | Active |
Sources
The primary and reference sources this topic draws on.
- NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.