Enigmatic Planet Nine may have been seen by telescope in the 1980s

There is an ongoing debate about whether a huge "super-Earth" lurks in the far reaches of our solar system – but we may actually have observed it almost 40 years ago

Enigmatic Planet Nine may have been seen by telescope in the 1980s
There is an ongoing debate about whether a huge "super-Earth" lurks in the far reaches of our solar system – but we may actually have observed it almost 40 years ago