Sooo…I might have bad news for you. In general, 3D renderers do their best to approximate physical phenomena, but there is always going to be a trade-off between speed/artistic control/general purpose approaches and accuracy/realism/edge or corner case approaches. I don’t know your background, so I apologize if I’m saying something you already know.
Though Blender’s renderers use some light modelling algorithms based on physical phenomena, they don’t model light to wavelength accuracy (spectral rendering). That being said, there are renderers that do render to that degree of accuracy. I believe LuxCoreRender is one (free, open source LuxCoreRender.org), Maxwell (commercial maxwellrender.com), Mitsuba Renderer (free, research-oriented mitsuba-renderer.org) all can get you what you want, but those trade-offs still exist.
As a space enthusiast myself, I wish you luck and I’d love to see any results you are able to achieve!