Alex Girón composed a demonstration and an explanatory blog (with elements of the source code) dedicated to the tracing of the moving Solar system using border-radius,CSS animation and affine CSS transformations (namely, animated turns from 0 ° to 360 °).
In Firefox, this demonstration looks like a fixed illustration:
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In web browsers (Chrome, Safari), the planets also rotate in their orbits.
In Explorer, the entire system takes on an extraordinary look: