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.
Credit: NASA/JPL/Space Science Institute. Saturnâs moon Titan seems to have little in common with Earth. At just 93 Kelvin, the giant moon is beyond ice cold, and its atmosphere is dominated by methane rather than nitrogen and oxygen. But in July, radar on NASA-ESAâs Cassini-Huygens mission found a landscape with a striking resemblance to Earth.