This is a popular space travel topic on Reddit. I think the most important aspect of this topic is that it reminds us of how small the universe truly is, and not just a very small fraction of everything in our entire universe.
Our smallest star is a red dwarf in the Orion constellation, the closest star to our sun, with an estimated diameter of a little over 1.1 light years. That’s more than half the diameter of Neptune, and less than half the average distance between the Earth and the Sun. So, with the current rate of expansion of the Milky Way galaxy, in 1 billion years it might take us around half a trillion years to get to the Milky Way galaxy.
There are so many small planets in our galaxy that we can only begin to count them. Just a simple example, our galaxy contains more planets that we can measure than the entire observable universe, or maybe we haven’t actually discovered them yet.
And that’s not the only thing that’s small, there are entire planets that are around the size of Earth that have no atmosphere, and are only around one hundredth the volume of our solar system.
The reason for this is that our galaxy has a very large black hole at its center. The Milky Way galaxy is the largest black hole in the universe. It is so massive that its gravity pulls in everything with a mass above a certain threshold. Everything below that threshold falls into the black hole and is crushed to a tiny and lifeless dust. We call this the “death spiral” because it’s like a death wish.
The death spiral is the most extreme form of gravity in our universe. It’s what pushes objects as far as we can, but since it’s so strong, it takes longer for things to fall towards the black hole center. This means the smaller you are, the larger the black hole. The smallest planet in the universe is probably some kind of dwarf planet.
This is actually the smallest known planet in the solar system. It is located in the galaxy NGC 5981 (aka the “Seychelles”) about 5,000 light years away from the center of the Milky Way galaxy.
It looks like NGC 5981 is the smallest known galaxy in our galaxy. This is because a lot of its stars are smaller than any other galaxy in our galaxy. This makes it a perfect candidate for being the smallest planet in our solar system.
According to the NASA website, this small dwarf planet has an estimated surface area of less than about 15 times the radius of Earth. It is only about 3,680 times the size of our galaxy. It’s not that big, but it’s pretty tiny.
NGC 5981 is a dwarf galaxy, one of a very large number of galactic dwarf galaxies in our galaxy. These massive galaxies are the result of the collision and merging of smaller galaxies and thus have larger sizes and surface areas than stars we see in the Milky Way galaxy. NGC 5981 is the smallest dwarf galaxy that was ever discovered and there are many others that have been discovered.