MICHEL MARTIN, HOST:
Much of South America experienced a solar eclipse this week. NPR's Joe Palca went to Chile to see it in its totality. And because half of the world's major telescopes are in Chile, he decided to stick around and see what researchers are studying. And Joe Palca is with us now from 17,000 feet.
JOE PALCA, BYLINE: Hey, Michel. How are you doing?
MARTIN: OK. So where are you right now, exactly?