Posted: Oct 08, 2019 10:00 am
by Spearthrower
Cito di Pense wrote:
Spearthrower wrote:
Svartalf wrote:actually there's a mechanism to explain the added mass, it comes from meteorites.


Insufficient by a looooong stretch.


It's not just insufficient. It's insignificant.



Right, it's something like 100,000 tonnes a year on average.

So if we consider that over a million years that'd mean an increase of one hundred billion tonnes. Lots of added mass, but in comparison to Earth's mass of 5.9 sextillion tonnes; less than a billionth of a percent of added mass over 1 million years.

And of course, that's not even considering the ways that the Earth loses mass through hydrogen and helium escaping the atmosphere, and radioactive decay. Estimates for these suggest an average of the Earth losing somewhat more than 100,000 tonnes via these processes every year.

This is not something that can be just waved away; even if there was evidence strongly pointing to the Earth expanding, this discrepancy would need to be explained, and they can't expect the idea to be accepted without it being accounted for.