A regular sunset (at least, twice a year...)

At first, it looks like an impossible transit of a planet over the Sun disk...

But soon it reveals what it is about : the set of the Sun right behind the main dome of the Cerro Tololo International Observatory (CTIO) :

No surprise though : this event happens every year from our observing spot, and every year we take the picture, maybe hoping for some subtle differences... Actually, this year there was a significant change : the sun disk harbors many sunspots, since we are currently in the rise of the 11-year magnetic solar cycle

So now, let's see what will happen next time (and yes, we'll be there again...)

Photos: Cristian Valenzuela / Observatorio del Pangue - November 2, 2024
Canon 60D with 200mm lens