Update

earth.md

@@ -38,4 +38,15 @@ X      v      v      v      v      v      v      v      v      v      v      v
 --....-----""""----""""         ""      "-..__    __......--"""""""     """                              .;_..... 
                                               """"      : ANTARCTICA
 X      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      ^      X
-```
+```
+
+Some numbers about the planet Earth:
+
+- age: 4.54 billion years
+- distance from the [Sun](sun.md) (nearest, furthest): 147098450 km, 152097597 km, 
+- radius (equator, poles): 6378 km, 6356 km
+- mass: 5.9 * 10^24 kg
+- acceleration by gravity: 9.8 m/s^2
+- axial tilt: 23.4 degrees
+- length of year: 365.25 days
+- land vs water area: 148940000 km^2, 361132000 km^2