Can we see parts of the universe that’s faster than the speed of light?
From what I recall in science class, the universe was formed from the big bang and went through rapid expansion called inflation. During inflation, the universe expanded faster than the speed of light and we can’t see it.
Or can we?
Derek Mueller of Veritasium addresses some of these misconceptions about the universe that we may have learned from our basic science class.
According to his channel description:
This doesn’t violate Einstein’s theory of relativity since nothing is moving through space faster than light, it’s just that space itself is expanding such that far away objects are receding rapidly from each other. Common sense would dictate that objects moving away from us faster than light should be invisible, but they aren’t. This is because light can travel from regions of space which are superluminal relative to us into regions that are subluminal. So our observable universe is bigger than our Hubble sphere – it’s limited by the particle horizon, the distance light could travel to us since the beginning of time as we know it.
If you’re interested in reading more about this, you can check out the 2003 research paper, “Expanding Confusion: Common Misconceptions of Cosmological Horizons and the Superluminal Expansion of the Universe” by Tamara M. Davis and Charles H. Lineweaver from the University of New South Wales in Sydney, Australia.