#spaceexploration – by @cosmic_odyssey on Instagram
Light travels at 300,000 km/second this means that in a year light travels 9.5 trillion km, which is what we call a light-year. The farther something is, the longer it takes for its light to reach us. Keeping this in mind, the most distant galaxy we see is so far away that its light has been traveling 13 BILLION years to reach us. BUT since the universe is expanding at such a rapid rate since the very beginning of time, this light actually comes from 46 BILLION light-years away. This extent is known as the particle horizon and it defines the edge of the \ »observable universe\ ». We know that the universe has no edges, but to our knowledge it’s as far as we could go! ��✨⭐️����