The young centre of the Earth (2016)
arxiv.org
The young centre of the Earth (2016)
1–10 of 74 posts
Re: The young centre of the Earth (2016)
#2What's the deepest core sample; 10 km? I assume isotope dating is no where near accurate enough to see the difference.
Re: The young centre of the Earth (2016)
#3What's the deepest core sample; 10 km? I assume isotope dating is no where near accurate enough to see the difference.
10 kms would not show any effect at all. The difference in gravity would be too low and mixing in the crust high.
Re: The young centre of the Earth (2016)
#4What's the deepest core sample; 10 km? I assume isotope dating is no where near accurate enough to see the difference.
Even if it were accurate enough, I think plate tectonics moves the crust around enough such that one would have a hard time finding a piece of rock that has been more or less always in the same depth. And I have no idea how static the core is, maybe even it undergoes some mixing process over long enough periods of time.
Re: The young centre of the Earth (2016)
#5How is it possible that the core is several years younger if the core and the surface have gone around the sun the same number of times?
Re: The young centre of the Earth (2016)
#6There's a "yo momma" joke just waiting to be made here...
Re: The young centre of the Earth (2016)
#7How is it possible that the core is several years younger if the core and the surface have gone around the sun the same number of times?
General Relativity
Re: The young centre of the Earth (2016)
#8There's a "yo momma" joke just waiting to be made here...
According to General relativity your mom is actually more attractive compared to other mothers...
Re: The young centre of the Earth (2016)
#9How is it possible that the core is several years younger if the core and the surface have gone around the sun the same number of times?
General Relativity
Parent comment is making a joke about “year” as a unit measuring how many times you go around the sun. Less time has passed for the core per relativity, but is it not the same number of years?
The more official definition of years defines it in terms of days, which break down further to SI’s rigorously defined second as the base unit of time. But it’s still weird to think about.
Re: The young centre of the Earth (2016)
#10How is it possible that the core is several years younger if the core and the surface have gone around the sun the same number of times?
Mass, gravity and general relativity. It’s a fascinating and very counter-intuitive at some moments, such as this.
Same goes for people that stay on the moon, when they go back to earth their watches are slightly different than those on earth. GPS satellites need to be synced with earth clock periodically as well for this reason.