- #1
oakstick
- 2
- 0
First let me thank you for allowing me to attend your forum.
Two queries actually, but I'll begin with this one. Once again I saw a graphic
depiction of the expanding universe in a news article. The usual one of course, the expanding balloon with the galaxies tattooed upon it's surface. One that for the most part works very well conceptually for me. I wouldn't have given it a second glance except for the odd comment attached from the scientist being interviewed for the article. I paraphrase here:
"you can see that as the balloon expands the galaxies move farther apart and yet the galaxies do not grow in size."
Umm, no, I can't quite see that. In fact this is the first time I've encountered this question. What I see is that as the rubber surface expands, everything moves further apart. From the distance between galaxies to the distance between neighboring stars. The balloon model would suggest that the very substance of space is expanding and carrying evrything with it.
But if the distances between the stars in our galaxy, indeed between the atoms of our own body, is not expanding in like then I must assume there is a threshold at which expansion loses it's grip. Can this be correct? Has there been any efforts to see if stars in a galaxy are fleeing each other as their parent galaxy is fleeing all others?
Again, thanks for the invitation
Two queries actually, but I'll begin with this one. Once again I saw a graphic
depiction of the expanding universe in a news article. The usual one of course, the expanding balloon with the galaxies tattooed upon it's surface. One that for the most part works very well conceptually for me. I wouldn't have given it a second glance except for the odd comment attached from the scientist being interviewed for the article. I paraphrase here:
"you can see that as the balloon expands the galaxies move farther apart and yet the galaxies do not grow in size."
Umm, no, I can't quite see that. In fact this is the first time I've encountered this question. What I see is that as the rubber surface expands, everything moves further apart. From the distance between galaxies to the distance between neighboring stars. The balloon model would suggest that the very substance of space is expanding and carrying evrything with it.
But if the distances between the stars in our galaxy, indeed between the atoms of our own body, is not expanding in like then I must assume there is a threshold at which expansion loses it's grip. Can this be correct? Has there been any efforts to see if stars in a galaxy are fleeing each other as their parent galaxy is fleeing all others?
Again, thanks for the invitation