This is what happens when galaxies collide; a billion year gravitational waltz. This supercomputer simulation includes images from Hubble of actual galactic collisions at different stages. 📽: NASA, ESA, and F. Summers

And here is the illustration of collision of Andromeda and Milky way galaxy that is predicted to happen in 4.5 billion years. NASA; ESA; Z. Levay and R. van der Marel, STScI; T. Hallas, and A. Mellinger

Hopefully I’m a sleep when this happens 🤯

How did astrophysicists get such wonderful results by simply considering the mass and gravity of trillions of stellar particles? How did they account for the countless unobservable planets and black holes in their models? As an engineer who has dealt with the Navier-Stokes equations, I wonder. But anyway, it is really beautiful.

We will die long time before this happend

amazing.

What’s cool is that to galaxies we’re perceiving time as if we’re moving near the speed of light. It’s all relative.

The Milky Way is destined to a major collision 💯

Imagine an alien living from just evolving at the right time to discover they are being engulfed by another galaxy. How much time do they have left? Is this chaotic or relatively calm for this species? Do they have thousands of years or millions?

The one on the right clearly had the right-of-way.

This is what's going to happen to the Milky Way and Andromeda some day...