What is a galaxy? The scientific definition of a galaxy is a “gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter.” In simple terms, this means a large clump of things that you might find in space.  The differece between a galaxy and the universe One of the most common misunderstandings about galaxies is the difference between a galaxy and the universe. Here is how you can tell them apart: First, the universe is everything. Every atom, every star, every black hole, every … Continue reading All about Galaxies