How big is our Universe?

It's safe to say that most humans do not have the slightest knowledge about our universe and perhaps, for those who claim to have, believe that our universe is just a combined "heaven" and "earth". Whilst the best information we can get about the universe from some people is that it's made up of our simple solar system - the Sun, Moon and the conventional nine planets.

Meanwhile, it's even more weird to realise that there are humans who aren't bothered with this - basic understanding of the universe. Undoubtedly, these are very basic knowledge which everyone should know... basic and very important. These information help us to understand our universe, to interact with it appropriately and shape our perception accordingly. So, how big is our universe?

With our modern telescope, the farthest we have been able to observe is a universe that is 93 billion light years (wide) in diameter. Mind you, this is just how much we can observe. Thus the diameter of our "observable" universe. But how big is the whole universe? Well, since we don't have direct measurement...we can only theoretize and scientists posit that the whole universe must be at least 23 trillion light years in diameter or more.

Now, let's talk more about our observable universe. The universe contains several galaxies which contains many stars and for some stars, have their own planets. Every star with its planets is called a planetary system just as our sun with the eight planets we know is just one solar (planetary) system out of many in our own galaxy which is called the Milky-way galaxy.

It will blow your mind that in our galaxy alone, we have 400 billion stars with around 100-200 billion planets. The Milky-way galaxy is 100,000 light years wide i.e. 946 quadrillion km in diameter. Mind you, in our observable universe, we have at least 200 billion galaxies with 700  quintillion planets in total.

So, when you look up there...you can imagine how vast the universe and perhaps, it's just "infinite"....who knows?