Wednesday, February 4, 2015

Planet Jupiter and the Moon in close encounter

During the last three days, planet Jupiter and the Moon has been quite close to each other. Here are three photos I took of them together.

The last photo was taken using a focal length of 110 mm and in the original photo you can clearly see three of four of Jupiter's biggest moons, the so called Galilean moons. The 4 moons are Io, Europa, Ganymede, and Callisto. When I took this photo Io (the innermost of the four) was behind planet Jupiter and therefore not visible.

In the upper left corner of that photo I've included a 100% crop of the original image of the area around Jupiter. As you can see both the planet and the moons are formed as short lines rather than spheres/dots, that's due to the long exposure of 8 seconds. During these 8 seconds, Earth rotation makes the entire sky move and this movement is recorded by the camera when using a longer focal length.

Photo taken February 2, 2015

Photo taken February 3, 2015

Photo taken February 4, 2015

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