Experiential data shows that light on its way out of a gravitionel field is losing energy and become redshifted. Q1. But what about light that moves into a gravitionel field, - Is that gaining energy (getting more blue shifted) ? Has we ever measured what happens with light that for example moves true a gravitionel field? For example we could compare light from Jupiter. “A” shows light that moves directly from Jupiter and to us (and hence only into the gravitational field of the Sun and the Earth) “B” shows that now is Jupiter on the other site of the sun. It is therefore possible to compare light from Jupiter, on the one hand when it moved directly to us, and therefore into the gravitational field of the Sun (exsample “A”) - and on the other hand “B” light that first moves into the Suns Gravitionel field and then out again until we revived it on Earth, on the opposite site of the Sun. A.) Jupiter----------- ----------> Earth Sun B.) Jupiter----------------------> Sun -------------> Earth Q2. Will light from Jupiter in these 2 cases be different redshiftet / blueshiftet ? Q3 Has such measurement experiments ever been executed?