Scientists make further step towards understanding dark energy

Re:Scientists make further step towards understanding dark e... by garmaine on Wednesday April 28, 2021 @05:25AM (#26967428)

You're both right and talking past each other. The light moved between two points that if measured at the start was fewer light-years apart than the time it took to cross the gap, or a greater number of light-years if measured now.

I think the most correct and relevant thing to say is that the light moved 1 light-year per year and covered exactly the specified distance, if you integrate the distance over the trajectory of the light as it moved across the universe. Inflation simply changes the geometry of the space before (or after) the light passes through.

[ Parent | on HN ]

Re:Scientists make further step towards understanding dark e... by danparsonson on Wednesday April 28, 2021 @06:22AM (#26967755)

> I think the most correct and relevant thing to say is that the light moved 1 light-year per year and covered exactly the specified distance, if you integrate the distance over the trajectory of the light as it moved across the universe.

Yes, so light travels X light years in X years, not substantially more than that which is how I read (or misread) the parent comment. Language is fun I guess.

[ Parent | on HN ]