And the Milk Way is just one galaxy in the Universe. Solar System – A group of objects orbiting around a star. Planet – A large, spherical object orbiting a star. Moon – A large object ...

While most objects in our solar system orbit ... proposed the universe is littered with primordial black holes. And we've even observed fluctuations of starlight in our own galaxy, which ...

However, it is now considered a dwarf planet instead. The universe has billions of galaxies, and our solar system is in the Milky Way Galaxy. The Milky Way contains at least 100 billion other ...