I've seen the same planet colored differently in different photos. Here are the true colors of major planets to the best of my knowledge (spacecraft photos appearing in the media often have false coloration): Mercury: grey; Mercury has practically no atmosphere, so we just see the rocky surface.
Sitting for hours can cause poor circulation which is a major cause of the heavy legs syndrome and if there no underlying medical condition and the feeling worsens when walking upstairs, then curiously enough, you might like to look at your diet for clues.
Some of the conditions that can cause leg cramps include: 1  Dehydration â when your body loses a lot of fluids, the salt levels get depleted, which can trigger the muscles in the legs to contract. 2  Usually, the reason for dehydration is not drinking enough, but severe diarrhea and vomiting can cause it as well.