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Thursday, October 08, 2015

Morning twilight from the 90 inch.

We were observing at the Steward Observatory 90 inch Bok Telescope last week and this was the view we had of the morning twilight sky.  On the left is the dome of the telescope and you can see the lights of Tucson on the left near the dome in the distance.  In the sky, the brightest "stars" roughly in line is Jupiter, Mars, Rigel and Venus bottom to top (Venus is the brightest).  On the right is the McMath Solar Telescope.  This image was taken with my Canon 70D and 10mm fisheye lens with an exposure of 13 seconds at f/4, ISO 400.

This is the view south from the Bok Walk on the south side of the 90 inch dome.  High overhead is the slightly brighter than last quarter moon with Orion to its left.  The Spacewatch 36 inch dome is the most prominent dome below the Moon.  This image was taken with my 10mm fisheye lens on my 70D with an exposure of 13 seconds at f/4, ISO 400.