Neil deGrasse Tyson

It becomes a cosmic body at that level.

Wow.

Because it's not big enough to sustain it anymore.

And it gets frozen in that state.

Yeah.

So because it's relatively recent, well, recent in my professional life, last several decades that we came to learn that star systems, like we take the solar system, for example, with its eight stars.

planets that if you run the models that star systems such as ours likely began with like 30 planets or something, or planetesimals, and many of those orbits are just unstable and they collide with each other and it gets resolved.

And so it takes a while for that to sort of shake out and find out who's left.

Who survived?

Survivor billiards.

And don't you even have, there's some asteroids where there look like there are two pieces that are stuck together that didn't break apart.

Right, right, right.

It's not a clean boundary between asteroids and comets, right?

Yeah, yeah, yeah, yeah.

So now when we think of life, you know, I think we're carbon-based.

That's, you know, everybody knows that.

And we eat food and we have crops and we eat plants and animals.

And I always see phosphorus showing up as some key ingredient.

And not being a biologist, I've never fully...

come to appreciate what role that plays.