Everything about The Local Interstellar Cloud totally explained
The
Local Interstellar Cloud, also called the
Local Fluff, is the
interstellar cloud (roughly 30 light years across) that our
solar system is currently moving through. The Solar System entered the Local Fluff at some time between 44,000 and 150,000 years ago and is expected to remain within it for another 10 to 20,000 years. The cloud has a temperature of 6000° C, about the same temperature as the surface of the
Sun. It is very thin, with 0.26 atoms per cubic centimeter; approximately one-fifth that of the galactic
interstellar medium and twice that of the gas in the
Local Bubble. In comparison,
Earth's atmosphere at
STP has 2.7 × 10
19 molecules per cubic centimeter.
The cloud formed where the Local Bubble and the
Loop I Bubble met. The Sun, with a few other local stars, is embedded in the Local Fluff. Notable extra-solar systems include
Alpha Centauri,
Vega,
Arcturus, and
Fomalhaut.
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