Zooming Out to Distant Galaxies

S1 E1: Define the difference between astrophysics and astronomy. Then study the vast range of scales in astrophysics - from nanometers to gigaparsecs, from individual photons to the radiation of suns. Get the big picture in a breathtaking series of exponential jumps - zooming from Earth, past the planets, stars, galaxies, and finally taking in countless clusters of galaxies.