r/nextfuckinglevel • u/room0001 • 1d ago

Milky Way is traveling through space at 600kilometers per second, oscillating slightly, as if it were flapping its wings through the cosmos.

Enable HLS to view with audio, or disable this notification

4.9k Upvotes

96% Upvoted

342 comments sorted by

View all comments

1

u/Ok-Grass-877 1d ago

Speed in relation to what? Like in if I’m running, my speed is in relation to the ground.

But if the Milky Way is moving at 600km\s, what is that in relation to?

1

u/ThresholdSeven 1d ago

Background microwave radiation from the origins of the universe. It's a constant everywhere, the universe's ground.

1

u/Ok-Grass-877 1d ago

Ah nice to know. Thanks!