4 ms·
They don't. Light from distant stars has red shift, similar to Doppler shift. IF this red shift is interpreted as Doppler shift, then we can calculate correspo
by v_lisivka 9y ago
They don't. Light from distant stars has red shift, similar to Doppler shift.
IF this red shift is interpreted as Doppler shift, then we can calculate corresponding velocity and then calculate position of a star at today date, and we will see that visible Universe is expanding. However, we need to point to source of energy for that expanding (with acceleration!). Nobody able to find that source yet.
IF this red shift is interpreted as something else (e.g. loses due to friction), then visible Universe is still.
- badosu 9y ago> IF this red shift is interpreted as something else (e.g. loses due to friction), then visible Universe is still. This is a pretty interesting idea, I wonder if a consistent model of EM frequency damping with distance traveled could be built.
- v_lisivka 9y agoIMHO, you don't need that. If you will accept that our Universe is «digital» in nature (i.e. you cannot have 1/2 of black hole or 1/2 of star, of 1/2 atom, etc.), then you will see that each photon can be represented by large _integer_ number. This means that photon will lose 2*1/2 of it smallest digit at each revolution at average. Exceeding energy will make vacuum «hot». It's all.