The Voyager 2 is a space probe launched by NASA on August 20, 1977 to study the outer Solar system and eventually interstellar space. It is expected that Voyager 2 will move out of Solar system after five to seven more years.
Another probe Voyager 1 is moving in another direction of the Solar system and scientist confirmed that it is already out of the Solar system and reached interstellar medium.
The probe is now moving at a velocity of 15.428 km/s.
Voyager 1 finally out of Solar System
First image of planet outside solar system made by Gemini and Keck II telescope
Most detailed dark matter map is generated using Hubble Space Telescope