Not UFO related but .... Space "New" disc galaxy discovered.
https://www.space.com/wolfe-disk-massive-galaxy-discovery.html
This process is thought to be fairly gradual, taking a long time. But the newly discovered galaxy DLA0817g, nicknamed the "Wolfe Disk," which scientists believe formed in the early universe, suggests that disk galaxies could actually form quite quickly.
yet ..... somehow Middle Earth comes to mind