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Rovers are an important tool in the research of planets or celestial bodies. And is widely used by NASA.

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In 1997 The NASA created the first wheeled robot to explore the Mars surface.

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The rovers had many instruments to analize the surface of the planet

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The United States has managed to land on Mars nine times: Viking 1 and Viking 2 (both in 1976), Pathfinder (1997), Spirit and Opportunity (both in 2004), Phoenix (2008), Curiosity (2012), InSight (2018) and Perseverance (2021).

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It first leaves the earth in a rocket and establishes itself in Earth orbit. Then it leaves for Mars and stabilizes in its orbit and finally disengages and goes down into Mars in a module and that's it.

https://www.youtube.com/watch?v=EEjwm9yfHoM

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I was in 2021 when the perseverance arrived Mars, an it was an amazing experience because i was waching it on line.

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Perseverance's trip has a cost of $2.1 billion, according to NASA. And its needed the work of hundreds of persons working for 10 years around.

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On March 13, 2006, the Spirit rover's front wheel broke. That unfortunate malfunction led to a surprising discovery by Spirit. The rover's broken wheel kicked up bright white dirt, which turned out to be concentrated silica deposits. . “This showed that there were once hot springs or steam vents at the Spirit site.

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1. Detection of organic compouns on Mars surface

2. Variability of methane

3. Age of exposition of crater Gale

4. Discoverments about water in Mars

5. Biologically usefull nitrogen