These are the Planet's assets. Free to use! But warning, some of them are leaked from Vince, and you need to give credit to him if you use one of those leaked planets! Credit to Vince Doyen for the Planets. But before you use one of Vince's made planets, you have to have his permission to do so. As these are leaked assets from Vince, if they aren't, they are recreated.
sorry Vince, but people need assets and they aren’t as good as you :)