MSR meaning in Space Science ?

Answer:

What is Mars Sample Return mean?

A Mars sample-return (MSR) mission is a proposed spaceflight mission to collect rock and dust samples on Mars and return them to Earth. Sample return would be a very powerful type of exploration, because the analysis is freed from the time, budget, and space constraints of spacecraft sensors.

Many concept missions have been studied, but none of them got beyond the study phase. The three most current concepts for an MSR mission are a NASA-ESA proposal, a Chinese proposal, and a Russian proposal, Mars-Grunt. As of 2021, although NASA and ESA's plans to return the samples to Earth are still at a very early stage, samples are being gathered on Mars by the Perseverance rover.

reference

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