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06/24/2013 – Ephemeris – Infrared astronomy

June 24, 2013 Comments off

Ephemeris for Monday, June 24th.  Today the sun will be up for 15 hours and 33 minutes, setting at 9:31.   The moon, 1 day past full, will rise at 10:27 this evening.  Tomorrow the sun will rise at 5:58.

During most of history astronomers viewed the heavens in visible light.  That’s all we had, our eyes, later augmented by telescopes, and photography.  Today astronomers view the heavens with a myriad of detectors on the earth, above the earth and inside the earth.  Radiation detected, beside visible are radio, infrared, ultraviolet, x-rays, and gamma rays, all part of the electromagnetic spectrum as is visible light.  Besides that the observe neutrinos and cosmic rays, and are searching for gravitational waves.  An intense field of study now is infrared, which must be observed from high mountaintops or from space.  Last year I visited one of those facilities at nearly 14,000 feet altitude the observatories atop Mauna Kea in Hawaii. [Which included the two largest telescopes in the world the twin 10 meter Keck telescopes, Gemini North, Subaru and other telescopes. ]

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.

Addendum

Keck Observatory

The twin domes of the Keck 10 meter telescopes. Left is the Japanese Subaru telescope. Right is the NASA Infrared Telescope facility. Credit: Bob Moler.  Click to enlarge.

Gemini North

The 8.1 meter Gemini North telescope dome in the center. To the left is the Canada-France-Hawaii Telescope dome. Credit: Bob Moler.