Voyager 2 is a probe launched by NASA in 1977 to study and explore the outer planets in our solar system and beyond. Voyager 2 was launched along with Voyager 1 in 1977 with a few days gap. Voyager 2 becomes the second spacecraft to get into the interstellar space. Voyager 1 reached the interstellar space in 2012.
Both the spacecrafts are physically identical, but they took different paths through the solar system. Voyager 2 crossed the heliosphere (a bubble of magnetic fields & plasma that surrounds the Sun) in 2018. According to NASA the spacecraft entered the interstellar space.
Voyager 2 had 16 hydrazine thrusters, sun sensor and star tracker to control the position of antenna. The probe had 11 scientific instruments installed in it to study celestial objects. Spacecraft carries a 3.7 meter parabolic high gain antenna to communicate with Earth. This information is received through NASA’s Deep Space Network (DSN) and It takes around 16.5 hours to receive data from the spacecraft.
Both Voyager carrying a gold plated audio video records, in the event that spacecraft is ever found by alien life from other planetary systems. As of today, Voyager 2 is about 18.3 billion km away from Earth. The spacecraft is expected to keep transmitting data by the mid of 2020s until its power die. Until then, the probe will continue to keep sending data back to its home planet.