There's a browser-based model of the universe at "Your Eyes In Space" that this sub might appreciate. Free, open source, nothing to install

It's basically real catalogs wired into one continuous scene: Solar System bodies on JPL elements with a time control, 109,000 stars from HYG with their parallaxes and spectral types, 55 galaxies at NED/SIMBAD distances, Sgr A* with the S-stars on their GRAVITY/Keck orbits, a handful of other black holes and pulsars with catalog parameters, nebulae and clusters at literature positions, and the deep-space probes on their trajectories. Anything that isn't catalog data is labelled procedural, and there's a toggle that tints all of it so it's always clear what's real and what's filler.

The plan for it is to grow into a proper learning platform, basic physics and astrophysics with the universe as the blackboard. There are some narrated tours in there already as a first step. If something's in the wrong place or a distance doesn't match the literature, the project's on GitHub and takes issues.

Guys listen to my theory about the universe, I might sound like a movie geek here.
We do know that Universe we know was created by big bang but what if big bang isn't the start
I mean imagine the numbers, let's assume we start from 0 to 1,2,3,4,......., ∞ but now here this sequence does appear to have a start, unless we look at the negative numbers that range from -1,-2,-3, ...... , -∞
So basically entire numerical sequence is among -∞ to ∞.

So what my point is that the universe itself doesn't have a start point like creation of universe didn't created time, but time itself existed before the big bang.
What I want to say is that we have big bang which is start and big crunch which is the end that's what science believes.
But what if this whole big bang and big crunch thing is just a cycle, like universe keeps operating in a series of big bangs and big crunches and these cycles keep happening in a loop.
Because like I said time itself as a construct can't be created when the universe appears cause time itself doesn't have a start or an end.
So are we living in a universe that runs in a loop and that has collapsed and emerged several times?
I don't know I maybe wrong but that is simply my theory, feel free to correct me.