[–] DeliciousOnions ago
If you don't want to go any deeper that's fine but just know that they are "like" each other in superficial ways only. There are pretty significant differences that can be proven, not just the realm of philosophical bullshitting.
If you want to get into cool philosophical "why are things like this" then I would point you in the direction of the Fractal Universe Theory. A galaxy is a bunch of stars orbiting around a center. The solar system is a bunch of planets orbiting around a center. Atoms are... Hmmm. Why would the universe follow this pattern at so many scales?