voyager spacecraft illustration nasa
The data suggests the presence of previously unknown boundary layers beyond the edge of our solar system — the area known as the heliopause.
NASA’s Voyager 2 probe exited our solar system nearly a year ago, becoming the second spacecraft to ever enter interstellar space.
It followed six years behind its sister spacecraft, Voyager 1, which reached the limits of the solar system in 2012. But a plasma-measuring instrument on Voyager 1 had been damaged,