Hi Vanessa, I'm not an astronaut, but I did go to Space Camp when I was in high school. At Space Camp, they had a funny harness on springs that we could use to simulate what it was like to walk on the Moon. I remember it being kind of weird and having to sort of bounce up then down to the side to pick up something on the ground without falling over. I think you are also asking about where astronauts have been in our solar system. The Apollo astronauts have been to the Moon. Astronauts on the Space Shuttle and International Space Station have only been in orbit around the Earth. Astronauts have not visited any of the other planets in the solar system yet. However, unmanned spacecraft have visited every planet in the solar system. We have not been to Pluto yet, but there is some disagreement on whether or not Pluto is actually a planet. The New Horizons Mission (http://pluto.jhuapl.edu/) is currently on its way to Pluto. I don't think that any of the other Solar Week scientists are astronauts either. A lot of the Solar Week scientists analyze data from unmanned spacecraft orbiting around the Earth or around the Sun. We do our work in offices, laboratories, or observatories right here on the Earth. Kris