In past, if you looked up into the sky, you were an astronomer. But everything has gotten so complicated. Now we have astrophysicists, and cosmologists, planetary geologists, and even exobiologists. Who does what, and how do they all interact with one another. If you want to go into space research as a career, which one should you choose?
Astronomy Cast Ep. 271. September 2012
Does anybody like that I post all these videoes about astronomy/the universe?