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.
The degeneration caused by RA tends to affect the smaller joints in the body first, namely the joints in the fingers, hands, and feet. The damage then spreads to other major joints in the body. RA usually affects the body symmetrically, which means the same joints on both sides of the body will show symptoms.