Although Mercury and Mars will appear to move in the same direction as both planets enter the range of the C3 camera, they are really heading in opposite directions using the stationary/central Sun as a reference.
https://www.youtube.com/watch?v=w2uCtot1aDg
All planets passing behind the Sun, whether the faster moving Venus and Mercury or the slower moving Mars, Jupiter and Saturn are in direct motion as they move from right to left as Mercury is in that time lapse footage and Mars is currently-
https://sol24.net/data/html/SOHO/C3/96H/VIDEO/
Only Venus and Mercury are in retrograde motion as they pass between the slower moving Earth and the central Sun as also seen in the time lapse above leading to the transit of Venus in 2013.
There is a lot to expand on in putting together this new type of astronomy now and in the years to come. The solar system research community along with observational community is a big Church and we share when wee can our individual pursuits and talents
as adults.
"When a natural discourse paints a passion or an effect, one feels within oneself the truth of what one reads, which was there before, although one did not know it. Hence one is inclined to love him who makes us feel it, for he has not shown us his own
riches, but ours. And thus this benefit renders him pleasing to us, besides that such community of intellect as we have with him necessarily inclines the
heart to love." Pascal
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