Quotes from Red and Blue

If we are looking into the deep reaches of the cosmos, what we actually see is the past, that is, an image of things at a certain point in their history.

Red and Blue · About the Universe

It is obvious that all our observations are subject to certain limitations, and the most important of these is the finite speed of light.

Red and Blue · About the Universe

As you've found that all galaxies are moving away from each other, it's pretty reasonable to assume that, at an early point, all matter was condensed in an infinitesimally small singularity - as specified by the Big Bang theory.

Red and Blue

Therefore, the standard cosmological model assumes a continuous expansion of space, supported and validated by the proportionality between the speed at which galaxies move away from us and the distance to them (Hubble's Law).

Red and Blue