The average distance is about 150 million kilometers (149.6) or 93 million miles (92.9). This is defined as 1 astronomical unit, or AU, and is equal to about 8.2 light-minutes, as light from the Sun takes about 8 minutes to reach Earth.
The definition of a scourge is someone or something that causes a lot of trouble, problems or suffering. An example of a scourge is famine or the outbreak of a disease. YourDictionary definition and usage example.
Scavenger (chemistry) A scavenger in chemistry is a chemical substance added to a mixture in order to remove or de-activate impurities and unwanted reaction products, for example oxygen, to make sure that they will not cause any unfavorable reactions. Their use is wide-ranged: