The only known body in the solar system to be habitable by people is Earth, so in a real sense it is already habitable. It's also possible that humans could survive in specialized environments on bodies other than Earth, for example in climate controlled, pressurized artificial habitats; technology on a scale to make an entire planet or moon habitable without use of such special equipment is currently beyond our reach.
Yes It's not my solar system.
You're in the solar system right now.You've been in the solar system since the moment you were born,and you'll be in it for the rest of your life.You can never journey to the solar system, because you're in it now,and there's no way you'll ever be out of it.
No, nobody has ever left the solar system.
No.
No. The solar system is part of the Milky Way Galaxy and is very unlikely ever to leave it.
Depends "very" much on the definition of the boundary of the solar system, but it's possible Voyager I may well have.
Ever since the world and the solar system were created.
Meteorites have probably hit every other object in the solar system.
Yes more than you can ever imagine
Ever since ancient times people have been looking up and trying to figure out what is out there so it is hard to say just one person discovered the solar system.
No astronaut has ever been to the 'outer reaches' of the solar system. As far as is known to the public, no human has ever been farther from earth than the moon is, and that's less than 1 percent of the distance to the nearest planet.
No, astronomers have not physically gone out of the solar system. They study space and celestial bodies using telescopes and spacecraft like Voyager 1, which has reached interstellar space but is still within the boundaries of our solar system. Astronomers rely on these tools to explore the universe beyond our solar system.