Explanation of the appearant *retrograde* (going backward) motion of planets

Explanation of the appearant retrograde (going backward) motion of planets

Oce Eeco
8:04 AM Feb 26 2014

Stashed in: Mars!, Space

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Such a good use of an animated gif! Is there a video too?

Adam Rifkin
12:05 PM Feb 26 2014

Click the source lazy panda!

Oce Eeco
1:36 PM Feb 26 2014

Looks like a flash animation, not a video.

Adam Rifkin
6:33 PM Feb 27 2014

Indeed

Oce Eeco
7:22 AM Feb 28 2014