An eclipse of the Moon can only take place at Full Moon, and only if the Moon passes through some portion of the Earth's shadow. The shadow is actually composed of two cone-shaped components, one inside the other.
Joints affected by rheumatoid arthritis include the small joints of the hands, legs and the cervical spine; in other cases the bigger joints like the shoulders and the knees are also affected. The effects of rheumatoid arthritis on the affected joint is failure to function making the patient have a hard time doing small things for themselves.
Inflammation of joints in RA typically occurs in a symmetrical fashion, in other words, joints on both sides of the body will be affected. The earliest joints to be affected by inflammation in RA are usually the hands (including wrists) and feet. The elbow may also be affected early in the course of the disease and is the site most frequently affected by RA nodules. The shoulder is a common site for RA-related inflammation.