Actually the moon is only 1.3 light seconds away, so a ping of ~2.7s to the moon is possible! Mars would be annoying to communicate with though: 25-44.8 minute

Actually the moon is only 1.3 light seconds away, so a ping of ~2.7s to the moon is possible! Mars would be annoying to communicate with though: 25-44.8 minutes for a roundtrip signal.