|Big Brain Machine view of Venus Transit 2012 - All photos copyright Humanoido|
A transit of Venus occurs when Venus passes directly between the sun and earth. This alignment is very rare, coming in pairs that are eight years apart but separated by over a century.
This happens when Venus passes in between the orbits of the Sun and Earth. This digital preprocessing image was taken about one hour ago, on Wednesday June 6th, 2012 at 11:49 am local time from Taiwan. As the sun rose, clouds and overcast completely intervened. During the time span from 11 am on into the afternoon, it suddenly cleared to a beautiful blue sky and the best images were captured. Previous atmospheric studies indicated such a weather pattern clearing was likely, and this held true.
|Venus Transit 2012 Full solar view|
|June 5th, 2012 sunspots|
|June 6th sunspots during the transit|
Note: no solar filters were used and the telescope was not aperture stopped down, however, the water vapor content of the atmosphere was extremely heavy, creating a layer acting as a reflective filter. (Taiwan is an island surrounded by ocean.) The telescope was set up on top of a very tall skyscraper overlooking the city, on a very heavy and stable concrete perimeter which has unobstructed views of the horizon in all cardinal directions. The telescope's temperature was monitored to avoid overheating and damage to optical, metal and polymer parts, as the image was safely projected and three cameras were used.
The image was received by a standard size clipboard mount with an Advanced Agro Double A A4 Premium sheet of photographic print paper of 210 x 297mm size at 80gsm. A small breeze at that height made keeping things in one place challenging. At one time, the telescope shroud was blown off during a break in astro imaging.
The two additional cameras were a Canon and Apple iPhone. Changes in heat temperature made periodic refocusing necessary for the most successful image sharpness. Several times, the SONY camera overheated and failed. Actual ambient temperature was around 95 degrees and in the sun directly the temperature rose to at least 120 deg. F on upwards to oven-like heat. To avoid heat stroke, the imaging session was suspended before event completion.
Images were downloaded to a Mac computer and preprocessed with Apple iPhoto using Edit, Adjust, Exposure, Contrast, Definition, Sharpness and Rotate. About 140 images were captured with the Sony camera and a set with a Canon Ixus 100 IS. Apple iPhone 3G held four images, primarily as a backup plan in case the other images underwent some anomaly phenomenon.
|1994 OTM Venus Transit article image|
Work is progressing to montage the motion of Venus across the face of the sun with the AT telescope and to utilize the Big Brain's new GT Telescope in space to study the nature of Venus' atmosphere as it filters solar radiation.
The Big Brain machine retains a complete image archive of the 2012 Venus Transit from two telescopes and three imaging cameras.