" Uranus (pardon my french) is not a planet anymore and is something else..."
Uranus is a gas giant. There is Jupiter, Saturn, Uranus and Neptune. All gas giants. Jupiter is such a LARGE gas giant that some callit a 'failed' brown dwarf (a type of star)...
Perhaps you are thinking of pluto
I'd be hesitant to say that Astronomers are lying. They have data to support their hypothesis. Do you have contradictory data?