Eight years depending on where in orbit they are and speed the craft is going
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Many American spacecraft have reached Mars. All were unmanned, however.
Humans, no. Unmanned spacecraft, yes.
The Mariner 1 spacecraft was unmanned spacecraft to fly to mars
Mars
It would take nine months.
The 1976 unmanned spacecraft that took pictures of Mars was called Viking 1. The Viking program consisted of two spacecraft, Viking 1 and Viking 2, which both successfully landed on Mars and sent back a wealth of images and data about the planet's surface. These missions provided important insights into Mars' geology, weather, and potential for past or present life.
Venus is the only planet where unmanned spacecraft have successfully landed and explored. The Soviet Union's Venera program landed several probes on Venus in the 1970s and 1980s, providing valuable data about the planet's atmosphere and surface conditions.
Unmanned exploratory spacecraft are commonly referred to as "probes." These vehicles are designed to travel beyond Earth's atmosphere to gather data about various celestial bodies, such as planets, moons, asteroids, and comets. Examples include the Voyager spacecraft, which have traveled beyond our solar system, and Mars rovers like Curiosity and Perseverance.
The Viking Space Probes did not go to Jupiter. They were used to explore Mars.
Zero. Nobody walks on mars, and nobody has ever walked on mars.
The time it takes for a spacecraft to travel from Earth to Mars can vary depending on the positions of the planets in their orbits. On average, it takes around 7-9 months for a spacecraft to reach Mars from Earth using current technology.