More specifically, cosmonauts have traveled to:

* Earth orbit: This is the most common destination, where they conduct research, perform maintenance on the International Space Station, and observe Earth.

* The Moon: Soviet cosmonauts were the first humans to orbit the Moon, and the only humans to have landed on the lunar surface (other than the US Apollo astronauts).

* Other celestial bodies: Although no cosmonauts have traveled beyond the Moon yet, future missions could see cosmonauts exploring other planets and asteroids.

It's important to note that "cosmonaut" is the term used for astronauts from Russia and other countries that were part of the former Soviet Union. The term "astronaut" is typically used for those from the United States and other countries in the Western world.