The reason I dont make any project on space because we cant express the beauty of space in one model no matter how big the model is yes if it is a room size model then I think we cam express as in this solar system all planets move around the sun because of gravitational pull in their fixed elliptical orbit but the sun and even the whole universal itself is in motion everytime so if we make this then we have to also show the sun along with the whole solar system mover around the centre of our galaxy or the centre of our super massive blackhole