- Could "dark energy" pushing galaxies apart be a huge illusion?
How can we be certain that it is not the case that a minor proportion of the red shift from distant galaxies is not caused by the doppler effect or by gravitational fields or by dispersion from cosmic dust but is caused by a light aging factor? There is a small general red shift from stars held together across the other side of our own galaxy around one hundred thousand light years away. But light coming from a galaxy one billion light years away has been vibrating electromagnetically for ten thousand times longer than that. So can we be certain that there is not a light aging factor causing the energy per photon to drop over such an immense amount of time . Would it not then follow that the concept of a mysterious “dark energy” universally pushing distant galaxies apart is a huge illusion?