The planets in our solar system orbit the sun in a plane, the “ecliptic plane”. Seen from the side within that...

The planets in our solar system orbit the sun in a plane, the “ecliptic plane”.  Seen from the side within that plane from here on earth, they appear to travel in a line in the sky.  As the planets travel in different orbits at different speeds, they…
http://www.jeffsullivanphotography.com/blog/2017/12/30/jupiter-mars-conjunction-coming-night-january-6-7-2018/

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