text:  It was last seen, what, 7,500 years ago? So it has a really slow trajectory within our solar system, but it is so massive that it caught NASA, got their attention, and got a few astrophysicists talking about it. And once it was published that, hey, we've got something that's going to get really close to the Earth. And when you're talking astronomy, we're talking just too close for comfort. And it turns out,