Thirtieth+Sizeome

=Thirtieth Sizeome is the Solar Heliosphere of the Galactic Consciousness.=

Solar Heliosphere info:
Artistic diagram showing progression through heliosphere, the [|Oort cloud], and out to [|Alpha Centauri] on a logarithmic scale to one million AU. [|(NASA, 1999)]

=‍[|Heliosphere]=

NASA image of the heliosheath and heliopause

The **heliosphere** is a bubble in [|space] "blown" into the [|interstellar medium] (the hydrogen and helium gas that permeates the [|galaxy]) by the [|solar wind]. Although electrically neutral atoms from interstellar volume can penetrate this bubble, virtually all of the material in the heliosphere emanates from the [|Sun] itself. It was thought for decades that it extends in a long comet-like heliotail, but in 2009 data from the [|Cassini] and [|IBEX] show a different shape. However, depiction of the heliotail is still common. Another change is that the heliosheath area is not smooth but filled with magnetic bubbles.[|NASA 2011]

For the first ten billion kilometres of its radius, the solar wind travels at over a million km per hour. As it begins to drop out with the [|interstellar medium], it slows down before finally ceasing altogether. The point where the solar wind slows down is the **termination shock**; then there is the heliosheath area; then the point where the interstellar medium and solar wind pressures balance is called the **heliopause**; the point where the interstellar medium, traveling in the opposite direction, slows down as it collides with the heliosphere is the **bow shock**.