Chromaffin cell. Chromaffin cells, also pheochromocytes, are neuroendocrine cells found mostly in the medulla of the adrenal glands (located above the kidneys) in mammals.
The Moon has no appreciable atmosphere. The sky is always black and the radiation from the Sun strikes with full force on the surface of the Moon. The lack of atmosphere produces temperature extremes on the Moon that range from -250 degrees F in the dark to +250 degrees F in the light.
The Moon orbits the Earth and the Earth-Moon system orbits the Sun. The nodes are the points in the orbit of the Moon where it crosses the orbit of the Earth-Moon system around the Sun. When the Moon is at one of these nodes, the Moon, Earth, and Sun are lined up so that an eclipse can occur.