David Kipping

It'd be like 10 to 20 kilometers bigger than Mount Everest.

It'd be a huge piece of rock.

But you know, I think Abby's probably made the wrong bet on that one because as we saw in the in the Hubble image That there's a freaking coma on that thing.

There's no doubt and we've actually imaged it with Hubble Space Telescope James yesterday So it is a comet.

Not completely.

It discredits the idea because his idea was if it's 10 to 20 kilometers in size, that just shouldn't happen.

That's too big by chance for a rock to stray into the solar system that's that big because there just shouldn't be that many big rocks lurking around in deep space.

If it's a smaller comet, there's actually a size estimate now that puts it at a couple of kilometers, I think, as the upper limit.

Yeah, so that makes it, if it's 300 meters across, I mean, it's just a completely normal comet.

Yeah, because you can see this diffuse coma all around it.

So all that stuff.

There's actually, even today, there was a paper on Published.

that detected water coming off it.

Which is what comets do.

They produce OH emission as they fly through.

So we know without any doubt it's a comet at this point.

But there's still some weird things.

It's moving really freaking fast.

That was the other thing Avi pointed out.

It's moving 58 kilometers per second, which is...