THE #WOODLANDS, Texas — Efforts by scientists to use a Mars rover to collect samples are continuing even as #NASA wraps up a new assessment of when and how those samples will be brought back to Earth.
The Perseverance rover, which landed on Mars in February 2021, has filled 26 of its 43 sample tubes, scientists involved with the mission said in presentations at the Lunar and Planetary Sciences Conference (LPSC) here March 12. The rover is climbing up the remains of a river delta that once flowed into Jezero Crater.
Of those 26 tubes, 20 contain rock cores, said Meenakshi Wadhwa, a planetary scientist at Arizona State University who serves as principal scientist for Mars Sample Return (MSR) at the Jet Propulsion Laboratory. Two contain regolith and another holds a sample of the atmosphere, while the other three are “witness tubes” that serve as controls to identify any terrestrial contamination in the other tubes.

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