1. Voyager 1: Launched in 1977, Voyager 1 is the farthest spacecraft from Earth. It conducted flybys of Jupiter and Saturn in 1979 and 1980, respectively, and has continued to send data and information about the outer solar system and beyond.
2. Voyager 2: Launched in 1977, Voyager 2 is also still operational. It performed flybys of Jupiter, Saturn, Uranus, and Neptune in 1979, 1981, 1986, and 1989, respectively. It's currently in interstellar space and continues to send valuable scientific data back to Earth.
3. New Horizons: Launched in 2006, New Horizons performed a historic flyby of the dwarf planet Pluto in July 2015, providing the first close-up images and detailed information about this distant world. It is currently in the Kuiper Belt, the region beyond Neptune that contains icy objects, and continues to send data back to Earth.
These probes have been operating far longer than their original mission durations and have provided a wealth of scientific discoveries and insights into the planets, moons, and environments they've explored. They are a testament to the engineering and scientific achievements of NASA and continue to contribute to our understanding of the solar system.
