RACHEL MARTIN, HOST:
Later today, an eclipse will sweep across the Pacific Ocean and then pass over parts of Chile and Argentina. One thing that makes this eclipse special is that it's going to pass directly over a major observatory in Chile. And you know who is there right now at that observatory? Our own Joe Palca.
JOE PALCA, BYLINE: Hi there, Rachel. How are you?
MARTIN: I'm well. I'm going to try to pronounce this - the observatory is called Cerro Tololo, correct?
PALCA: That's right. It's the Cerro Tololo Inter-American Observatory.