No astronauts have ever been to Mars, and no rock samples have ever been sent to Earth.
The only place astronauts have been other than Earth, is on the moon. When they were there, they did some exploring to see what it was like. They took samples of the soil and rocks to bring back to Earth. They tried to learn as much as they could while they were there. If astronauts get to visit other planets, they would do the same kinds of things.
Scientists are bringing back samples from Mars so they can study the elements that the planet is made of. They can figure out if there ever was life on the planet just by studying the soil. Also, they will be able to find out if humans could ever inhabit Mars.
They brought back samples of rock, dust and other moon objects. moon rocks
No, after the hiatus in season three, the show was offically cancelled. However there was talk about a movie, but nothing has come of it.
When astronauts go on missions they come back with a few specs of stardust.
no astronaut was ever sent to mars
they take samples of the ground and take it back for testing
Because people haven't figured out how to bring enough fuel so that the astronauts can get back so right now it is a suicide mission.
The only place astronauts have been other than Earth, is on the moon. When they were there, they did some exploring to see what it was like. They took samples of the soil and rocks to bring back to Earth. They tried to learn as much as they could while they were there. If astronauts get to visit other planets, they would do the same kinds of things.
So that it can be studied.
Scientists are bringing back samples from Mars so they can study the elements that the planet is made of. They can figure out if there ever was life on the planet just by studying the soil. Also, they will be able to find out if humans could ever inhabit Mars.
After astronauts arrive at Mars they will need to wait 15.4 months for the Earth and Mars to line up right before they launch In order to make it back home.
Primarily rock, soil samples, pictures, and personal experiences, though there were other experiments performed (such as the solar wind collector, and UV camera experiment) which were also returned.
The mars rover is a robot sent to mars to take samples and pictures for scientists to analyse back on earth, for detailed information i suggest Wikipeia
It's too expensive to bring humans back from Mars
They brought back samples of moon sand and moon rocks.
Astronauts, knowledge, and photographs (Apollo 8 did not land on the moon).