Mars Perseverance Rover da NASA deposita a primeira amostra na superfície marciana para possível retorno à Terra


Primeiro tubo de amostra Perseverance na superfície marciana

O rover Perseverance da NASA depositou a primeira de várias amostras na superfície marciana em 21 de dezembro de 2022, o 653º dia marciano, ou sol, da missão. Crédito: NASA/JPL-Caltech/MSSS

O tubo de amostra, que é preenchido com rocha, será um dos 10 formando um depósito de tubos que o[{” attribute=””>Mars Sample Return campaign could consider for a trip to Earth for in-depth analysis.

On December 22, NASA’s Perseverance Mars rover placed a titanium tube containing a rock sample on the Red Planet’s surface. Over the next two months, the rover will build humanity’s first sample depot on another planet by depositing a total of 10 tubes at the location, called “Three Forks.” The establishment of the depot marks a historic early step in the Mars Sample Return campaign.

Perseverance Deposits Its First Sample on Martian Surface

Perseverance Deposits Its First Sample on the Martian Surface: Once the Perseverance team confirmed the first sample tube was on the surface, they positioned the WATSON camera located at the end of the rover’s robotic arm to peer beneath the rover, checking to be sure that the tube hadn’t rolled into the path of the wheels. Credits: NASA/JPL-Caltech/MSSS

Perseverance has been taking duplicate samples from rock targets the mission selects. The rover currently has the other 17 samples (including one atmospheric sample) taken so far in its belly. Based on the architecture of the Mars Sample Return campaign, the rover would deliver samples to a future robotic lander. The lander would, in turn, use a robotic arm to place the samples in a containment capsule aboard a small rocket that would blast off to Mars orbit, where another spacecraft would capture the sample container and return it safely to Earth.

The depot will serve as a backup if Perseverance can’t deliver its samples. In that case, a pair of Sample Recovery Helicopters would be called upon to finish the job.

Testing a Sample Drop in Mars Yard

Testing a Sample Drop in the Mars Yard: Engineers use OPTIMISM, a full-size replica of NASA’s Perseverance rover, to test how it will deposit its first sample tube on the Martian surface. Credits: NASA/JPL-Caltech

The first sample to drop was a chalk-size core of igneous rock informally named “Malay,” which was collected on January 31, 2022, in a region of Mars’ Jezero Crater called “South Séítah.” Perseverance’s complex Sampling and Caching System took almost an hour to retrieve the metal tube from inside the rover’s belly, view it one last time with its internal CacheCam, and drop the sample roughly 3 feet (89 centimeters) onto a carefully selected patch of Martian surface.

But the job wasn’t done for engineers at NASA’s Jet Propulsion Laboratory in Southern California, which built Perseverance and leads the mission. Once they confirmed the tube had dropped, the team positioned the WATSON camera located at the end of Perseverance’s 7-foot-long (2-meter-long) robotic arm to peer beneath the rover, checking to be sure that the tube hadn’t rolled into the path of the rover’s wheels.

OPTIMISM Sticks the Landing

OPTIMISM Sticks the Landing: Engineers react with surprise while testing how NASA’s Perseverance rover will deposit its sample tubes on the Martian surface. Credit: NASA/JPL-Caltech

They also wanted to ensure the tube hadn’t landed in such a way that it was standing on its end (each tube has a flat end piece called a “glove” to make it easier to be picked up by future missions). That occurred less than 5% of the time during testing with Perseverance’s Earthly twin in JPL’s Mars Yard. In case it does happen on Mars, the mission has written a series of commands for Perseverance to carefully knock the tube over with part of the turret at the end of its robotic arm.

In the coming weeks, they’ll have other opportunities to see whether Perseverance needs to use the technique as the rover deposits more samples at the Three Forks cache.

“Seeing our first sample on the ground is a great capstone to our prime mission period, which ends on Jan. 6,” said Rick Welch, Perseverance’s deputy project manager at JPL. “It’s a nice alignment that, just as we’re starting our cache, we’re also closing this first chapter of the mission.”

Trazendo amostras de rochas de Marte de volta à Terra: Esta curta animação apresenta os principais momentos da campanha de Retorno de Amostras de Marte da NASA e da ESA, desde o pouso em Marte e a proteção dos tubos de amostra até o lançamento deles para fora da superfície e o transporte de volta para a Terra. Crédito: NASA/ESA/JPL-Caltech/GSFC/MSFC

Mais sobre a missão

Um objetivo chave para a missão do Perseverance em Marte é astrobiologia, incluindo a busca de sinais de vida microbiana antiga. O rover caracterizará a geologia e o clima passado do planeta, abrirá caminho para a exploração humana do Planeta Vermelho e será a primeira missão a coletar e armazenar rocha e regolito marcianos (rocha quebrada e poeira).

As missões subsequentes da NASA, em cooperação com a ESA (Agência Espacial Européia), enviariam espaçonaves a Marte para coletar essas amostras seladas da superfície e devolvê-las à Terra para análises aprofundadas.

A missão Mars 2020 Perseverance faz parte da abordagem de exploração Moon to Mars da NASA, que inclui Ártemis missões à Lua que ajudarão a se preparar para a exploração humana do Planeta Vermelho.

O JPL, que é gerenciado para a NASA pela Caltech em Pasadena, Califórnia, construiu e gerencia as operações do rover Perseverance.

Fonte original deste artigo


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