Source 2 (abbreviated S2), also known as S0â2, is a star that is located close to the radio source Sagittarius A*, orbiting it with an orbital period of 15.56 Â± 0.35 years and a pericenter distance of 17 light hours (18 Tm or 120 AU)âan orbit with a period only about 30% longer than that of Jupiter around the Sun, but coming no closer than about ...
Breathing In the Smoke. Marijuana smoke is also filled with many of the same chemicals as tobacco smoke, including ammonia, hydrogen cyanide, and formaldehyde. Some of these chemicals are known to cause cancer. Most users smoke pot in a joint or water pipe, so they breathe the smoke straight into their lungs. There's no proof that smoking marijuana causes lung cancer like cigarettes do. But people who smoke pot do show signs of damage and precancerous changes in their lungs, especially if they also smoke cigarettes.
1 For moderate smokers it is 1-2 weeks. Frequent users can test positive more than 2 weeks, and in rare cases marijuana can stay in the system of heavy smokers more than a month.  Hair. This kind of test is less common and key factors do not have any impact on its marijuana detection time.