We are so small and insignificant in the universe that it's hard to fathom. If the Earth were to disappear tomorrow, the universe wouldn't even notice.
For example, when you look at the Earth:
Now, compare it to Jupiter and Saturn...
But when you compare it to the Sun, the Earth is just a tiny speck, and you realize that the Sun is truly immense.
Now, let's compare it to other stars in the Milky Way.
Antares is a massive and impressive star, right? Well, take a look at the Milky Way... I'm sure you'll agree that it's nothing compared to the Milky Way!
The Milky Way is an impressive galaxy, but it's not necessarily unique. There are still billions of galaxies in the observable universe.
If something were to happen to Earth tomorrow, it would have no significant impact on the universe.
It's like taking a drop of water from the ocean.