3 ms·
Same way as the pressure only pushes "inward". The sign is reversed.
by cambalache 6y ago
Same way as the pressure only pushes "inward". The sign is reversed.
- ike77 6y agoI don't get it? If there is vacuum everywhere: vacuum --- us --- vacuum --- galaxy --- vacuum Why would galaxy go away from us? I expect that the vacuum on the left of the galaxy applies the same force on it as the vacuum on its right and thus should have a null net effect on its movement?
- cambalache 6y agoImagine that space (well space-time) it is a single elastic band and you pull it by both ends, you will have a more or less uniform tension in the middle part of the band and yet everything is receding from you. Same principle here. Using your same diagram vacuum <---- us -----> <----vacuum----> <-----galaxy---->