It's hard to say definitively which satellite is the most famous, as "fame" can be subjective. But here are some strong contenders, depending on how you define "fame":

* The International Space Station (ISS): This is probably the most well-known satellite due to its sheer size, the constant presence of astronauts, and the frequent media coverage.

* Hubble Space Telescope: This iconic telescope has revolutionized astronomy and captured breathtaking images of the universe, making it a symbol of scientific achievement.

* Sputnik 1: The first artificial satellite launched into Earth orbit, Sputnik 1 holds a significant place in history as a symbol of the Space Race.

* Voyager 1 & 2: These probes have travelled further than any other human-made object and continue to send back valuable data from the edge of the solar system.

Ultimately, the "most famous" satellite depends on the context and criteria used for judging fame.