How VAST is the Universe? An answer that's impossible to believe

How vast is the size of the universe? We trace the scale from Mercury to the largest galaxies to find out. We begin with the smallest planets and expand outward to massive stars like UY Scuti, which dwarf our own sun. By examining these astronomical objects, we can better visualize the immense gaps between stars and galaxies that make up our neighborhood. The journey continues through the Supercluster Complex and into deep space, where we observe galaxies consuming gas. Understanding this cosmic scale reminds us of our unique position on Earth. We look at the data behind these structures to see how the total size of the universe changes as we zoom out. If you appreciate space and cosmology, please subscribe for more science explainers, and let us know which part of the universe you want us to map next.