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.
According to the Mayo Clinic, the following is what causes leg cramps: -Dehydration -Muscle overuse -Muscle strain Repeating a particular motion for a long period or standing in one place too long may also lead to cramping ... In some cases, leg cramps are caused by chronic ... Main cause of leg cramps www.lifescript.com/health/briefs/m/main_cause_of_leg_cramps.aspx. b> Muscle cramps develop when a muscle involuntarily tightens and will not relax, causing sharp, intense pain. ... The main cause of leg cramps is muscle overuse. Other, less common causes of leg cramps include: Dehydration; Muscle strain or injury; Lack of the minerals potassium ... What causes leg cramps at night www.lifescript.com/health/briefs/w/what_causes_leg_cramps_at_night.aspx.