What I’d like to know is how the Assyrians knew about all the of planets in our solar system and that Saturn had rings, Uranus was blue-green and there was a missing planet. Is this a hoax? Bad interpretation of something else?
It is something else. Such information are hints, little teases, that there may have existed far in the past, before the great meltdown at the end of the last ice age, highly developed civilizations.
Around 15,000 years ago, sea level was 500 feet lower than that of today. Archaeologists in India have been discovering sunken cities of stone, with pyramids, offshore of southern coastlines. Their Vedas have hinted at such things but western academics pooh-pooh the idea.
Portolan maps are reputed to show the shorelines that existed 15,000 - 8,000 years ago (pre-inundation). Columbus supposedly possessed one. All this is pretty far out, but the Assyrians weren’t the only ones who knew about the actual configuration of the solar system. So did ancient peoples in Central America.
No, it's not a hoax. They learned these things from the Sumerians, who learned it from the Annunaki.