You could use a basic starchain type image as viewed from off-centre/below to create a taper effect going upwards… a homage to the original ETARC radio tower logo.
This could have a portal in the background as it seems to be a popular idea.
Do we actually need to have a border? It could simply be a chain of stars overlying a portal.
This link should have a few pics of the starchain when it was first found.
Post number 5
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