@stevenfoster4 @NASAJPL @NASA @CassiniSaturn It means Saturn existed for at least 4.4 billion years before the ring… https://t.co/Ak1uZf6e7f — beneboy303 (@beneboy303) 1547758601.0
@stevenfoster4 @NASAJPL @NASA @CassiniSaturn It means Saturn existed for at least 4.4 billion years before the ring… https://t.co/Ak1uZf6e7f