Mar 032015
 

Imaging conditions were poor last night with low transparency, a strong jet stream, and quite a bit of wind.  Nevertheless, I wanted to watch the double shadow transit from its moons Ganymede and Io.  The conditions didn’t cooperate early enough in the session, but I managed the following image showing Jupiter with Ganymede’s shadow in transit with Ganymede and Io to its right.

Ganymede, which shows some surface features in this image, is slightly larger than our moon and is Jupiter’s largest moon.  Io is furthest to the upper right.  It gets its bright yellowish color from the sulfur spewing from its volcanos — as it is the most volcanically active body in the solar system.

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Mar 012015
 

It’s been frigid here in the eastern U.S. over the past few months.  Despite the cold (the temperature sensor at the focuser said 14F at the start of the session), the skies cleared long enough to get a few hours of imaging data for Jupiter, last night.  The seeing was fair, despite a 100mph+ jet stream overhead.  The transparency was excellent.  Note the appearance of a disturbance in the south temperate band, as recently reported by Chris Go.

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Feb 162015
 
The Journal Nature Publishes Study on the Mars Plume

I am very pleased and proud to have had the honor of being a co-author on a paper published in the journal Nature, under the direction of Dr. Agustin Sanchez-Lavega.  The paper resulted from our group’s discovery of a high altitude cloud on Mars in 2012. Congratulations to our group of accomplished amateurs! Damian Peach, […]