The Voyager 1 and 2 are probes launched 42 years ago to study space past our solar system. They final reached deep space (past our solar system) in December last year. Another probe called New Horizon was launched on 2006 – it hasn’t traveled as far, but on New Years day of 2019 it came close to giant icy rock and gathered a lot of information that will help us better understand space. More information about the probes: