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In GR, coordinate are just a tool for us to describe the physics, they should be equivalent. However, in standard form of FLRW metric, it can be inferred that the universe is expanding, but we can do a coordinate transformation to make the spatial part static or changing in a different way with respect to time. They should be equivalent but why we on Earth only see the expanding universe. Does that mean our coordinate is somehow special?

In GR, coordinate are just a tool for us to describe the physics, they should be equivalent. However, in standard form of FLRW metric, it can be inferred that the universe is expanding, but we can do a coordinate transformation to make the spatial part static or changing in a different way with respect to time. Is there a notion of expanding universe which does not depend on coordinates?

In GR, coordinate are just a tool for us to describe the physics, they should be equivalent. However, in standard form of FLRW metric, it can be inferred that the universe is expanding, but we can do a coordinate transformation to make the spatial part static or changing in a different way with respect to time. They should be equivalent but why we on Earth only confirm the standard coordinates used in FLRW metric through our observation? Does that mean our coordinate is somehow special?

In GR, coordinate are just a tool for us to describe the physics, they should be equivalent. However, in standard form of FLRW metric, it can be inferred that the universe is expanding, but we can do a coordinate transformation to make the spatial part static or changing in a different way with respect to time. They should be equivalent but why we on Earth only see the expanding universe. Does that mean our coordinate is somehow special?