Which solar system model is best? For as long as humans could look up at the night sky, we’ve been fascinated with the stars. How far away are they? Where did they come from? What secrets do they hide ...

The 1 to 10 billion scale model not only represents the relative distance between the sun and the planets, but also their relative size. The sun is about the size of a grapefruit, while Earth is a ...

How fast and in which direction is our solar system moving through the universe? This seemingly simple question is one of the ...