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).
The average Earth-Moon distance is about 385,000 km, which is about 9.5 times the circumference. To make a quick scale model of this system, you will need a globe and a ball about a quarter of it's diameter to represent the Moon. Take a string and wrap it around the globe's equator about 9.5 times.