Question

which evidence supports the big bang theory? most galaxies are moving toward us. uniform background radiation is detected in every direction. planetesimals form in debris disks. galaxies spin faster than they should based on visible matter.

Explanation:

The Big Bang theory predicts a uniform cosmic microwave background radiation (CMBR) leftover from the early hot universe, detected uniformly in all directions. Most galaxies move away (not toward) us (Hubble's law), planetesimals relate to planet formation, and galaxy spin speed points to dark matter—none of these support the Big Bang as directly as uniform background radiation.

Answer:

Uniform background radiation is detected in every direction.