Introduction to Astrophysics S:1 E:18 When Stars Grow Old

S:1 E:18 When Stars Grow Old Trace stellar evolution from two points of view. First, dive into a protostar and witness events unfold as the star begins to contract and fuse hydrogen. Exhausting that, it fuses heavier elements and eventually collapses into a white dwarf – or something even denser. Next, view this story from the outside, seeing how stellar evolution looks to observers studying stars with telescopes.