Tucson Stargazing at Mount Lemmon SkyCenter

Author's Comments

Nine thousand feet does something to the sky that no amount of driving out into the desert will replicate. You climb the Catalina Highway from Tucson and the air thins, the temperature drops, the pines replace the saguaros, and by the time you reach the upper pullouts the basin is a distant smear of orange below you and everything above is clarity. The moisture is gone. The light pollution is beneath your feet. What is left is the sky as it actually is, which is more than most people have seen in their lives. The SkyCenter programs are worth the reservation if you have never looked through a serious telescope. The 32-inch will show you Saturn in a way that does not feel real. But for astrophotography I drive past the observatory itself and find a pullout a mile or two back down the road where no domes are spilling work light. Late summer is the season I keep returning for. The galactic core sits high in the south after astronomical twilight ends around nine, and from this elevation it has a structure and density that the desert floor cannot give you. The dust lanes resolve. The color is there in a single thirty second exposure. Bring more layers than you think. The mountain is twenty degrees cooler than Tucson and the wind picks up after midnight. Bring a red flashlight. Get your focus locked before full dark and do not touch the ring again. The hour I love most is the one just before the core sets in the west, when the Milky Way leans over the ridgeline of pines and the whole composition becomes a photograph about altitude as much as about sky.

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