Stars Can Be Blue, Red, or Yellow... But NEVER Green #space #astronomy #science #physics #spacefacts

Added: 2026-06-01

[00:00:00]Why are there no green stars? [music] Stars shine because they're hot, and their color is a direct read-out of their [music] temperature.

[00:00:08]The hottest stars blaze blue.

[00:00:11]Cooler ones glow red.

[00:00:13]In between, you get white and yellow.

[00:00:16]But green?

[00:00:18]Nowhere to be found.

[00:00:19]>> [music] >> Here's the trick.

[00:00:21]Stars don't emit a single color.

[00:00:24]They radiate [music] a broad rainbow of light.

[00:00:28]Our eyes add up all those colors at once.

[00:00:31]Imagine a seesaw with blue on one end and red on the other.

[00:00:36]As a star heats up, the seesaw [music] tilts.

[00:00:40]When the blue end is way up, we see blue.

[00:00:43]When the red end is up, [music] we see red.

[00:00:47]But at moderate temperatures, right in the middle, the seesaw stays level.

[00:00:52]Every color is balanced, and our eyes perceive the mix as white.

[00:00:58][music] Our own sun actually peaks in green light, yet [music] it looks white to us.

[00:01:05]The universe doesn't skip green on purpose.

[00:01:08]Our eyes just can't see a star that way.

[00:01:12]The cosmos is full of green light.

[00:01:14]>> [music] >> We just never get to enjoy a green star.

[00:01:19]Smash the thumbs up. Ring the bell.

[00:01:22]Share.

[00:01:24]And subscribe.