Into the unknown (Source: Merar Opher)
THE outer boundary of the solar system is distorted as though it has been punched from below. The evidence comes from NASA’s Voyager 2 spacecraft, which is about to cross the inner boundary even though it is closer to the sun than its twin spacecraft was when it crossed in 2004.
The Voyager craft have been racing out of the solar system for 30 years. “They’re a pair of old fridges out there,” says astrophysicist Merav Opher from George Mason University in Fairfax, Virginia, who has used the data to simulate the shape of…
