Would be great to be able to use this without space age mod enable (but using feature of space age extension)

Am I correct in that you're suggesting making it so this mod can be used if the Space Age features are available, just not enabled? That is, if someone owns the expansion, but is playing without space-age enabled?

If so, I can definitely look into doing that.

yes, I don't know if you use specific item from space age but if not in theory you just have to enable feature space_travel_required

You can also depend on https://mods.factorio.com/mod/enable-all-feature-flags, it's also contain a explanation about what I'm talking about.

Awesome, that's also what I was thinking of - I can certainly look into making the needed changes to accommodate that.

In honesty, with the release of Space-Age, I simply created this because I missed the "Satellite Mode" and surface scanning from Space-Exploration; I wanted those features in Space-Age, not considering whether this actually needs to require Space-Age or not (was brand new to Factorio modding then).

That's all to say, I think I should potentially be able to make it so this could be used even without Space-Age, i.e. with "Vanilla".