Opportunity (MER-B)

Mission overview

Opportunity was the twin of Spirit, exploring Meridiani Planum for nearly 15 years.

Found hematite 'blueberries' and strong evidence that liquid water once flowed on Mars.

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

Facts on this topic will be cited from these primary and reference sources.

NASA JPLJet Propulsion Laboratory / Solar System Dynamics
Orbital data, ephemerides, and small-body parameters for planets, asteroids, and comets.

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