Chronic disease is disease that persists over a long period of time. Chronic disease can hinder independence and the health of people with disabilities, as it may create additional activity limitations.hronic disease is disease that persists over a long period of time. Chronic disease can hinder independence and the health of people with disabilities, as it may create additional activity limitations.
Since the moon's orbit is elliptical (oval-shaped), its distance varies from about 221,463 miles (356,334 kilometers) at perigee (closest approach to Earth) to 251,968 miles (405,503 kilometers) at apogee (farthest point). The average distance from the moon to the Earth is 238,857 miles (384,392 kilometers).
Distance to the Moon. In astronomy, the distance of the Moon from Earth is known as the lunar distance. The average distance of the Moon from the center of the Earth is calculated to be 384,400 km (238,855 mi). This is the average of the distance at the apogee and perigee of the Moon from Earth. Methods for Calculation