Neil deGrasse Tyson

Okay.

Wow.

At least that's my opinion.

And you stick it to it.

Wonderful question.

Wonderful question.

And you have to watch out.

To presume that just because we have ideas about something that it'll never be tested.

There was one of the more boneheaded predictions made by a philosopher in the 19th century was, I love this.

I'm paraphrasing.

I love this field astronomy.

We can know where the stars are.

We can know what colors they are, but we will never know what they're made of.

that is forever beyond our reach.

And he's presuming to know what something's made of, you have to go there and sample.

This was like 10 minutes before spectra as applied to astronomy was invented.

And with spectra, as Charles said earlier, you can find out what are the chemical components of stars.

That's one of the great triumphs of 19th and 20th century modern astrophysics.

But the fact that we didn't know and someone got clever and figured out how to know

We are never stopped on the frontier just because we don't know how to do something yet.