The only planet humans have ever been on is Earth.
The only planet astronauts have visited is earth. The moon, a satellite, has also been visited.
By rocket
Earth.
earth
The answer is mars.
The only planet astronauts have visited is earth. The moon, a satellite, has also been visited.
Other than visiting individual space stations, the moon is the only place that astronauts have visited.
The atmosphere of these planets is not suitable for human exploration. Gases and extreme pressure would instantaneously kill astronauts. Funding and the distance to the gaseous would also be reasons we have not visited Jupiter or Saturn.
Humans have only visited the moon so far....sorry to disappoint but we are observers.
By rocket
Astronauts can see planets, stars, and species.
Earth.
They could, but as of now, no astronauts have travelled to any other planets in the solar system.
I would suppose that the scientist with the super powered telescopes would discover planets before the astronauts would.
Space astronauts went to the planets to be sure there is no life on planets
earth
There have , as of yet , been none .