The Visitor That Should Not Have Sped Up

[00:00:00]In October 2017, a telescope caught something falling through our solar system, and it didn't belong here.

[00:00:07]It came from another star.

[00:00:09]The first confirmed interstellar visitor we have ever seen.

[00:00:13]It was dark, scorched, stretched impossibly long, tumbling end over end as it passed the Sun.

[00:00:21]Then it did something a rock cannot do.

[00:00:24]It accelerated, speeding away faster as if pushed, but there was no comet tail, no gas, no visible force behind it.

[00:00:33]Every natural explanation broke against the numbers.

[00:00:36]We had 18 days to watch it before it vanished into the dark forever.

[00:00:41]And we still cannot say what pushed it.