Facts About Galaxies 🌌 w/ Neil deGrasse Tyson

Añadido: 2026-04-30

[00:00:00]Here's one that always gets me.

[00:00:01]>> The earliest forming galaxies in the universe radiated a lot of ultraviolet.

[00:00:05]So you might say, "Well, let's get an ultraviolet telescope." No, because 14 billion years later, the expansion of the universe has redshifted the ultraviolet into the infrared. So if you want to see the birth of galaxies, you got to know what they look like in the here and the now. And in the here and the now, it's in the infrared.