What is the most distant object humans have explored in space?

The most distant object humans have explored in space is the Voyager 1 spacecraft. It was launched by NASA on September 5, 1977, and is currently the furthest manmade object from Earth. Its mission was to study the outer Solar System and beyond, and it has sent back important data on the outer planets, as well as interstellar space.

Voyager 1 is currently located more than 14 billion miles from Earth, traveling away from us at a rate of about 38,000 miles per hour. It has passed through the heliosphere and is now in the interstellar medium, transmitting data about the conditions there, such as the magnetic field and the density of charged particles.

The Voyager 1 spacecraft is expected to remain operational until 2025, when the dwindling power supply will render it unable to communicate with Earth. However, its journey will continue, as it drifts through space and encounters new and unexplored regions of the galaxy.