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Al Paka

from Voyager by Lorimer Burst

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lyrics

I.) Heliosphere

As the solar wind continuously blows away from the Sun at supersonic speeds, it creates a cavity in interstellar space filled with solar material; the heliosphere.

In December 2004, Voyager 1 crossed the termination shock, where the solar wind is slowed to subsonic speed, and entered the heliosheath, where the solar wind is compressed and made turbulent due to interactions with the interstellar medium.

Three years later, in December 2007, Voyager 2 also reached the termination shock, about 1.6 billion kilometres closer to the Sun than from where Voyager 1 first crossed it, indicating that the Solar System is asymmetrical.

II.) Heliopause

Because the solar and interstellar plasmas have different compositions, densities, temperatures, and are braided by magnetic fields of different origin, they cannot interact freely and must be separated by a discontinuous boundary. This outer edge of the heliosphere is called the heliopause and marks the start of interstellar space, or rather, the start of the interstellar medium.

The Voyager probes first brought us data from this last frontier of the solar system. The dates were confused and mysterious.

To solve this puzzle, scientists need a better overall picture of the heliosphere. Their shape is still unknown due to lack of data. It may be roughly spherical due to the pressure of the interstellar medium. But it is just as possible that it has a tail like a comet or is shaped more like a croissant.

A better understanding of this border area also means that we can better understand the path of the sun through the galaxy - and thus the situation of other stars in the cosmos.

III.) Interstellar Mission

The Voyager 1 spacecraft crossed the heliopause in August 2012 at a radial 19 billion kilometers from the Sun and Voyager 2 in November 2018 at a distance of 18 billion kilometers

Unfortunately, the Voyager mission cannot continue indefinitely and power requirements will force the mission to an end; perhaps within the coming decade. New strategies to extend the mission, including a new power management plan, were recently implemented and the real-time status of the spacecraft can be found at https://voyager.jpl.nasa.gov/.

It is unclear when a follow-up mission will again reach interstellar space. Work is on-going in formulating such an interstellar probe in COSPAR’s (Committee in Space Research’s) Panel on Interstellar Research.

Voyager will be remembered as one of the greatest achievements in exploration.

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from Voyager, released September 22, 2022

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Lorimer Burst Hanover, Germany

lorimerburst.com

Post Rock from Hanover, Germany

Lorimer Burst music is as mysterious and fascinating as the Fast Radio Burst. Touching melodies, extremely powerful at some points, the listener will be put into orbit for a memorable journey. ... more

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