Part two of this three-part series asks us to think what life would be like if we lived in a binary star system. We are also introduced to black holes and Einstein's theory of relativity. A great clip shown in its three-part entirety or...

NASA was able to capture an image of our Milky Way galaxy that helps scientists better understand its composition and stellar evolution. A very clear narrator describes what the image shows and what it means to science and our galaxy.