Space Glossary Definition (English)
ACE Defined
The following is in context to Space, because it's common for a single word to have multiple meanings you will find additional research links near the bottom of the page.
"A spacecraft called Advance Composition Explorer, was launched on September 25, 1997. Its main job is to measure the composition of the solar wind, that is, to measure the various types of its charged gas particles. Some examples of these are positively ionized helium, oxygen, carbon, silicon, and many others, as well as the lightest, hydrogen, which is by far the most abundant element from the Sun."
, "The amount of ionization of the ions of the solar wind (i.e., the number of electrons stripped from their original atoms) depends on the temperature of the region on the Sun where the ions originated. Because of the high temperatures on the Sun, these ions usually have many more electrons stripped away than the atoms of the same elements in the ionosphere of Earth, say, where the temperatures are much lower. Considering oxygen, for example, we may observe O+7 or +8 (meaning 7 or 8 electrons stripped away) in the solar wind, but only O+1 or +2 (1 or 2 electrons stripped away) for oxygen in the ionosphere. For each positive ion in the solar wind, including the protons, which are the dominant constituents, there is an electron. So the solar wind is electrically neutral on average, just as is the Sun itself."
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