Mars vs. Earth
| |
EARTH |
MARS |
MARS RELATIVE
TO EARTH |
DISTANCE
FROM SUN |
|
| Average |
150 million km
(93 million miles) |
228 million km
(142 million miles) |
1.52 |
| Maximum |
152 million km |
249 million km |
|
| Minimum |
147 million km |
206 million km |
|
| SIZE |
|
| Diameter at equator |
12,756 km
(7,922 miles) |
6,786 km
(4,217 miles) |
0.53 |
| Surface Area |
511 million km2
(197 million mi2) |
144 million km2
(56 million mi2) |
0.28 |
| Part covered by water |
71% |
0% |
|
| TEMPERATURE |
|
| Average |
+15º C (59º F) |
-63º C (-81º F) |
|
| Range |
-88 to +58º C
(-27 to +136º F)
|
-125 to +22º C
(-194 to +72º F)
|
|
| ATMOSPHERE |
|
| Major constituents |
nitrogen, oxygen |
carbon dioxide |
|
| Minor constituents |
argon, carbon dioxide,
water (vapor) |
nitrogen, argon,
water (vapor) |
|
| Average pressure |
1,000 millibars
(14.7 lb/in2) |
6 millibars |
0.006 |
| GRAVITY |
|
| |
9.8 m/sec2
(32 ft/sec2) |
3.7 m/sec2
|
0.38 |
AVERAGE
DENSITY
(water = 1) |
|
| |
5.5 gm/cm3 |
3.9 gm/cm3 |
0.71 |
ROTATION
PERIOD
(DAY) |
|
| |
24 hours |
24.7 hours |
1.03 |
REVOLUTION
PERIOD
(YEAR) |
|
| |
365 Earth days |
687 Earth days |
1.88 |
|
