DID YOU KNOW? EARTH IS THE THIRD PLANET FROM THE SUN, AN OBLATE SPHEROID (ROUND), AND THE ONLY KNOWN PLANET TO SUPPORT LIFE, WITH ABUNDANT WATER AND A NITROGEN-OXYGEN ATMOSPHERE. IT IS THE LARGEST AND MOST MASSIVE OF THE TERRESTRIAL PLANETS, WITH A DIAMETER OF ABOUT 7,926 MILES, AND FORMED ROUGHLY 4.5 BILLION YEARS AGO. ITS AXIS IS TILTED 23.5 DEGREES, CAUSING THE SEASONS, AND IT ORBITS THE SUN IN APPROXIMATELY 365.25 DAYS.
