[xvilka]

I wish there was something for 3D level of exploration, preferably open source, something like Stellarium but in 3D, something similar to the navigation interface[1] in the Expanse TV series.

[1] https://www.joycenho.com/wp-content/uploads/2015/04/EXP-Stil...

[gnomewascool]

I'm not quite sure what your exact specifications are, but I think that Celestia[0] fits?

[0] https://github.com/CelestiaProject/Celestia

[allanrbo]

https://spaceengine.org/ , though it’s partially fictional if I recall correctly. Edit: oh and not OSS. Misremembered.