Why are galaxies moving away from one another?

This means that on average, for every Megaparsec two galaxies are separated by, they are moving away from each other by 70 km/s. Therefore, to be moving away from each other at the speed of light, two galaxies would need to be separated by a distance of about 4,300 million parsecs. read more

Galaxies, moving away from one another, was a necessity to counteract the conclusion that whole 3D matter in universe accumulate at one point, due to gravitational attraction. Stable galaxies do not move away or towards each other. read more

While it is easy to envision all galaxies moving away from each other, the evidence of smash-ups between these gigantic structures litter the Universe. This means that galaxies are both moving away and crashing into one another – this happens much more often than you think. read more

As we look out into the Universe, we see galaxies moving away from us faster and faster. The more distant a galaxy is, the more quickly it’s moving away. To understand why this is happening, go and get a balloon (or blow one up in your mind). read more