Creatinine is a toxin produced during the metabolism of meat in our body. Therefore, people with lots of muscles or who eat lots of meat always have a relatively high creatinine level, but it usually fluctuates in the normal range: 0.5-1.3mg/dL.
comet definition An object that enters the inner solar system, typically in a very elongated orbit around the sun. Material is boiled off from the comet by the heat of the sun, so that a characteristic tail is formed.
Comets Comets have a very small nucleus, a coma of gas and dust that is the most visible part and can be very large, a hydrogen envelope, a dust tail, and an ion tail. Comets ï§The cometâs tail always points away from the Sun, driven by the solar wind and radiation pressure. ï§ Comets have very eccentric orbits. ï§ Long-period comets (C/) have periods of hundreds of thousands, or even millions, of years. ï§ Short-period comets (P/) are less common, and have periods of less than 200 years.