Mars+1A

__Mars__ Mass (Earth=1) 0.11 Equatorial diameter 4,220 miles/6, 790 km Density (water=1) 3.95 Mean distance from the Sun 140 million miles/230 million km 35 million mi minium distance from earth rotational period 24 hr 37 min Sidereal period 687 Earth days Earth is 25 degrees tilt of Mars axis 0.38 * earth surface gravity Surface temperture -185 degreesF to +77 degreesF Number of satellites 2 about 7 mi long [ 11 km] Deimos about 12 mi [19 km] long Phobos Volume (Earth=1) 0.15 The largest canyon on mars would strectch from New York City to Los Angles on Earth. Italian Astronomer Giovanni Shiaparelli ( 1833-1910 ) made a close look of the surface of mars and of the canals on Mars.