The article states that "These activities are part of a two–year extended mission that began Oct. 1, the newest in a series of extensions going back to the end of Opportunity's prime mission in April 2004."
What does "extended" mean in this context?
The article states that "These activities are part of a two–year extended mission that began Oct. 1, the newest in a series of extensions going back to the end of Opportunity's prime mission in April 2004."
What does "extended" mean in this context?
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