[/caption]The size of Mars can not be given in one set of numbers. Scientists describe a planet by many factors. First there is radius, for Mars that is 3,389.5 km. Its circumference is 21,344 km. Next is volume, which is 1.63116 X 1011 km3. Last is Mar’s mass at 6.4169 x 1023 kg. For comparison, … Continue reading "Size of Mars"