Exploring Different Models of the Universe

[marie]

Dear All
I know that my question is not so related to this, but i will appreciate any answer. Why could we have 2 different models for the universe ( one expanding, collapsing...) although both are receiving the same experimental data... I need to write an essay about this topic. I have ideas:
Each model depend on factors different from the other.

 

[phinds]

Dear All
I know that my question is not so related to this, but i will appreciate any answer. Why could we have 2 different models for the universe ( one expanding, collapsing...) although both are receiving the same experimental data... I need to write an essay about this topic. I have ideas:
Each model depend on factors different from the other.

Well, we COULD have a model of a collapsing universe but it would not fit the data and in science that a very bad model indeed.

 

[PeroK]

Dear All
I know that my question is not so related to this, but i will appreciate any answer. Why could we have 2 different models for the universe ( one expanding, collapsing...) although both are receiving the same experimental data... I need to write an essay about this topic. I have ideas:
Each model depend on factors different from the other.

I suggest you need to do more reading on this subject.

There are three possible models for a universe - that all satisfy Einstein's equations for GR. The experimental data will eventually tell us which of these our universe is.

 

[bapowell]

I suggest you need to do more reading on this subject.

There are three possible models for a universe - that all satisfy Einstein's equations for GR. The experimental data will eventually tell us which of these our universe is.

Just to clarify: the universe can have one of three possible *global geometries*. The OP is evidently concerned with expansion vs contraction, which applies regardless of geometry. But as Phinds points out, evidence supports an expanding universe.