Think about this for a second; it takes us around three days to reach the Moon, approximately seven months to get the closest planet to us, namely Mars, 15 months to reach Venus, six years to reach Jupiter, seven to reach Saturn, 8.5 years to reach Uranus, 9.5 years to reach Pluto – the closest dwarf planet, and twelve years to get to Neptune, the farthest planet.
The Sun is 0.00001581 light-years away, and in the best-case scenario, we could reach it in 25 days. So how big is the Universe? Its around 93 billion light-years. How much is that? Well, let’s think about the Sun again. The Sun is one astronomical unit (AU) away from us. One astronomical unit is 149,598,000 km / 92,955,887 miles, and in our top shape, we could reach it in 25 days. Now, the Universe is 93 billion light-years across, and one, just one light-year, is equivalent to 63,000 astronomical units.
As such, one light-year is the equivalent to 9 trillion kilometers / 6 trillion miles, and our Universe is 93 billion light-years in diameter. That’s how big our Universe is, and that’s not even the end of it. The 93 billion years is just the observable Universe, the Universe, which we can currently see. The whole Universe might very well be 250 times larger than the observable Universe, or at least 7 trillion light-years in diameter.
Why is the Universe so Big? The Universe is so big because it is constantly expanding, and it does so at a speed that even exceeds the speed of light. Space itself is actually growing, and this is going on for around 14 billion years or so.
Think about how big you are compared to an ant or an atom. There is a huge difference even there. It all has to do with our perception, and even in our current modern age, our perception of the Universe is vastly limited.
