Stunning photos of the solar eclipse over South America

The sun flares behind the moon in today's solar eclipse, seen from the La Silla European Southern Observatory in Chile.

(CNN)A total solar eclipse stretched across South America on Tuesday. Just after 4:30 p.m. ET, viewers of a livestream and in parts of Chile and Argentina witnessed a stunning transformation of the sky as day turned to night and the moon progressively blocked the sun.

Here's what it looked like:
A tourist tries special glasses at Chile's La Silla European Southern Observatory ahead of the eclipse.
A man takes pictures of a total solar eclipse in Chascomus, Argentina.
The solar eclipse begins.