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 Many causes of leg pain are obvious, such as injury after an accident. 2  Leg pain can have less obvious causes, such as peripheral artery disease. 3  Repetitive, excessive sports, especially in the form on running, can lead to trauma that creates leg pain-E.G: shin splints and stress fractures. Repetitive, excessive sports, especially in the form on running, can lead to trauma that creates leg pain-E.G: shin splints and stress fractures. 2  Leg pain with an underlying medical cause may be nerve-related, musculoskeletal or vascular.