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 elements sodium (Na) and potassium (K) have been detected in the Moon's atmosphere using Earth-based spectroscopic methods, whereas the isotopes radon -222 and polonium -210 have been inferred from data obtained by the Lunar Prospector alpha particle spectrometer.
Others say that it was captured by Earth's gravitation. The moon is Earth's satellite, and one of the only satellites which is the closest in size to the planet that it orbits. The moon has a diameter of 3476 km and orbits the earth at a distance of 384,400 km at a speed of 3600 km/hr. The moon has 8 different phases within its period which lasts 29.5 days.