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.
1 If you experience leg cramps you will feel the pain of aching legs for at least one or two days. 2  Standing or sitting with the wrong posture can lead to additional strain on your lower back and limbs causing achy legs.3  Medications. 4  Sometimes medications have leg pain side effects. If you experience leg cramps you will feel the pain of aching legs for at least one or two days. 2  Standing or sitting with the wrong posture can lead to additional strain on your lower back and limbs causing achy legs.