A frequent photoblog with select favorites of my photographs. Subjects are typically nature, landscape, astrophotos, existing light.
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Saturday, January 04, 2014
Clouds and stars
The thin cirrus slowly thickened during the night while I've been observing at the 90 inch Bok telescope of Steward Observatory on Kitt Peak. With these two photos, you can see lots of stars, but if the clouds weren't there, you'd see even more. The first image shows a view towards the southeast from the "Bok Walk" on the south side of the 90 inch dome. On the right you can see the McMath solar telescope with the lights of Nogales Arizona lighting up the clouds above that town. On the left is Tucson doing an even better job of lighting the clouds overhead. This image was taken with my 10mm fisheye lens and an exposure of 30 seconds at f/2.8, ISO 6400 on my Canon 70D.
This view is towards the south with the McMath solar telescope on the left and in the foreground are the two Spacewatch Telescopes. The white dome on the right is our 36 inch telescope and the silver dome to its left is our 1.8-m telescope. In the sky you can see the Milky Way rising from the central horizon towards the upper right with Orion and his faithful hunting dog Canis Major with the brightest star in the nighttime sky, Sirius, to his lower left and Jupiter is the brightest object in the sky at top just right of center. This image was taken with my 10mm fisheye lens and an exposure of 30 seconds at f/2.8, ISO 6400.