A penumbral lunar eclipse occurs when the Moon passes through Earth's penumbra. During a lunar eclipse only the umbra and penumbra are applicable. Earth's shadow can be divided into two distinctive parts&colon; the umbra and penumbra. In cerebral infarction, the penumbra has decreased perfusion. Partial solar eclipses occur when the viewer is inside the penumbra. The ischemia area is referred to as the "ischemic penumbra". An observer in the penumbra experiences a partial eclipse. The area around the damaged ischemia is known as the penumbra. "Eclipse Penumbra" (1988), and "Eclipse Corona" (1990). Worlds ruled by illithids in other spheres include Falx, Ssirik Akuar, Penumbra, and Glyth. The existence of a penumbra implies that salvage of the cells is possible. Filipino dance group El Gamma Penumbra, and runner-up, Khusugtun. A prequel novelette, "Ajax Penumbra 1969", was published in 2012. "Penumbra" composer Mikko Tarmia is now contributing to Wolfire Games' upcoming game project "Overgrowth". The first iteration of the engine, HPL Engine 1, was used for the "Penumbra" series.