How Do Scientists Know It's Space Expanding Not Galaxies Moving?

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How Do Scientists Know It's Space Expanding Not Galaxies Moving?

Gawdzilla Sama Offline

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#4

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving?

August 10, 2017 at 8:02 am

(August 10, 2017 at 6:45 am)chimp3 Wrote: I am reading a book by Neil DeGrasse Tyson right now and he explains this. Space is expanding because some galaxies are moving away from us faster than the speed of light. Since matter can not go that fast it is the expansion of space.

Yep, and the balloon analogy Rhondavous mentioned is a great example of "This is space, this isn't." We're inside the balloon. There's nothing outside it. In this Universe, at least.

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Messages In This Thread

How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 10, 2017 at 6:37 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Gawdzilla Sama - August 10, 2017 at 6:40 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by chimp3 - August 10, 2017 at 6:45 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Gawdzilla Sama - August 10, 2017 at 8:02 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Brian37 - August 10, 2017 at 8:14 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Edwardo Piet - August 10, 2017 at 8:31 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 10, 2017 at 9:14 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Anomalocaris - August 10, 2017 at 9:30 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 10, 2017 at 4:16 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Brian37 - August 10, 2017 at 8:12 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by AFTT47 - August 13, 2017 at 1:32 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Succubus - August 13, 2017 at 10:56 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Brian37 - August 13, 2017 at 7:35 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 12, 2017 at 8:34 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 13, 2017 at 1:37 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Gawdzilla Sama - August 10, 2017 at 7:53 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 10, 2017 at 9:52 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Edwardo Piet - August 10, 2017 at 11:21 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 10, 2017 at 11:58 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by vorlon13 - August 10, 2017 at 11:25 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Anomalocaris - August 10, 2017 at 11:33 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by vorlon13 - August 10, 2017 at 11:38 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Anomalocaris - August 10, 2017 at 11:43 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Jackalope - August 15, 2017 at 1:40 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by vorlon13 - August 10, 2017 at 11:52 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Gawdzilla Sama - August 13, 2017 at 12:53 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by GUBU - August 13, 2017 at 6:00 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by brewer - August 13, 2017 at 7:49 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by bennyboy - August 14, 2017 at 12:22 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 14, 2017 at 2:55 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Jehanne - August 15, 2017 at 7:47 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 17, 2017 at 5:19 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 17, 2017 at 5:28 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 17, 2017 at 6:19 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 17, 2017 at 6:28 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 17, 2017 at 7:11 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 18, 2017 at 10:53 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 15, 2017 at 8:28 am

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Jehanne - August 15, 2017 at 12:43 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Alex K - August 15, 2017 at 4:24 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by CapnAwesome - August 17, 2017 at 5:59 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by LadyForCamus - August 17, 2017 at 8:26 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Jehanne - August 17, 2017 at 9:06 pm

RE: How Do Scientists Know It's Space Expanding Not Galaxies Moving? - by Rhondazvous - August 18, 2017 at 10:44 am

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