4 - Pathfinder, Spirit, Opportunity, Curiosity
THEY WERE SENT TO MARS SO THAT WE CAN DISCOVER MANY NEW THINGS ON MARS!!!
No one has sent 15 rovers to Mars
Yes, several space probes have been sent to Mars by various countries, including NASA's Mars rovers, Curiosity and Perseverance. Currently, there are also plans for crewed missions to Mars in the future.
Opportunity and Spirit,
7 rovers have been sent to mars. The first one landed in 1971
There are no plants on Mars. We know this because of the rovers we have sent and the satellites we have taking pictures of the planet.
Yes, NASA has sent several rovers to Mars, such as the Curiosity and Perseverance rovers, to study the planet's surface and gather data. Additionally, NASA has plans to send crewed missions to Mars in the future as part of its Mars exploration program.
"Spirit" and "Opportunity". Those two were sent in January, year of 2004. Before that a small one called "Sojourner". And now "Curiosity", of course. So that's 4 altogether. That's not counting those that failed.
There was sojourner, spirit, opportunity. Oh yeah! and the new one, curiosity.
As of November 2016 there are two operational Mars rovers: Opportunity and Curiosity.
Yes, several space ships have been sent to Mars by different space agencies such as NASA, ESA, and ISRO. Some of the most notable missions include the Mars rovers like Perseverance and Curiosity, as well as orbiters like the Mars Reconnaissance Orbiter and MAVEN.
None. Saturn does not have a solid surface. There is nothing to land a rover on. The only planet to which rovers have been sent is Mars.