"Night and Day"... the frame is complete !

We used to post pictures of the Sun setting behind the dome of the CTIO (Cerro Tololo Interamerican Observatory, our immediate neighbor), an event that happens twice every year, at the exact same dates. But on last January 15th, we've been granted with the setting of the Moon behind that same dome, and this is far more unusual as, for a given observing spot, it repeats every 10 years only... So now we got the two pieces of a unique collection !

For the record, here is again the picture of the last Sunset on Tololo, taken on the evening of 2020, November, 3rd. : same dome, same size of the disk...

So here is the frame, complete...

Photos: Cristian Valenzuela / Observatorio del Pangue