Largest galaxy with a diameter of 326.16 kly
RG 0-0-0-1145

Spoiler https://i.ibb.co.com/0JhtB6m/scr00269.jpg https://i.ibb.co.com/pnFh2Nw/scr00270.jpg https://i.ibb.co.com/9ZW3VtH/scr00271.jpg https://i.ibb.co.com/n3PD08B/scr00272.jpg https://i.ibb.co.com/PwtpWBZ/scr00273.jpg https://i.ibb.co.com/WWg51Mp/scr00016.png https://i.ibb.co.com/jVfmx4Q/scr00017 ...

RS 3727-35-6-38603-566
A BINARY SYSTEM WITH 24 PLANETS AND 3 WITH LIFE

No, the Space Engine universe should be identical for all users with stock installations of Space Engine, but locations may change if you install mods.

What if you are on another version?

A binary system, with a white main sequence star and a white dwarf with a disk, and an oceania planet with rings and life 
RS 8474-1353-6-171605-230 5

95.9% ESI???? RS 1406-1828-8-9571296-3601 4

This is probably common but in this planet's sky, there's a ring and 3 moons

This planet is half inhabitable and half habitable

So this moon called "RS 8476-4-4-3807-9 5.1" has alot of crazy things
1. It's a water world
2. You can see the parent planet and the entire galaxy in the night sky

found a carbon star and a galaxy in a planet's sky

Carbon Star

Planet with a galaxy in the sky (also a Cold Desert)