Voyager 2 passed Neptune’s moon Triton in 1989 and photographed it erupting, a discovery scientists called the flyby’s biggest surprise — dark plumes rising nearly eight kilometres and then drifting 150 kilometres downwind, on the coldest surface known

The solar system's coldest surface shouldn't be erupting, yet Triton's nitrogen geysers forced scientists to rethink what "dead" really means in the deep freeze. The post Voyager 2 passed Neptune’s moon Triton in 1989 and photographed it erupting, a discovery scientists called the flyby’s biggest surprise — dark plumes rising nearly eight kilometres and then drifting 150 kilometres downwind, on the coldest surface known appeared first on Space Daily .