Deep Space Trajectories: Exiting the Heliosphere

https://www.centauri-dreams.org/2024/04/03/deep-space-trajectories-exiting-the-heliosphere/

by well_i_never • 2 years ago

52 10 2 years ago

kibwen• 2 years ago

That image showing the potential shape of the heliosphere is very interesting, I wonder how it's possible for those weird cutout shapes to form in the heliosphere's tail.

Also, this is wild:

Along the evolutionary path, high interstellar cloud densities and ionization fractions have likely compressed the heliosphere down to below 25 au… Evidence is emerging for supernovae explosions as recent as 3 million years ago at only 20–50 pc from the Sun that probably compressed the heliosphere even below the orbit of Saturn and perhaps more, exposing the terrestrial planets to almost the full force of interstellar material and GCRs

greenavocado2• 2 years ago

I recently watched an interesting YouTube video which discusses potential disaster scenarios. The video itself rambles on and is difficult to follow but it raises some interesting points (https://www.youtube.com/watch?v=ihwoIlxHI3Q):

The Earth's magnetic field is weakening at an accelerating rate, signaling an upcoming magnetic excursion or reversal event within the next few decades.

This magnetic event is part of a recurring catastrophic cycle that happens roughly every 12,000 years and is triggered by the solar system's interaction with the galactic current sheet.

The interaction with the galactic current sheet will cause a "micronova" event on the Sun, leading to massive solar eruptions and disruptions to the Earth's systems.

Evidence for these recurring catastrophic events can be found in geological records, ancient stories and myths from around the world, and ongoing changes observed on other planets and nearby stars.

The author suggests that the government and elites are aware of this impending disaster and are secretly preparing underground shelters and bunkers.

The author encourages mental and practical preparedness for this event, including understanding local geography, resources, and potential safe locations.

According to the author, the galactic current sheet causes the recurring catastrophic cycle on Earth by triggering a "micronova" event on the Sun. Specifically, the author argues that:

- The solar system periodically passes through the high-density, dusty region of the galactic current sheet, which separates the north and south galactic magnetic fields.

- When the Sun enters this galactic current sheet region, the combination of the high dust/gas density, reversed galactic magnetic fields, and additional energetic particles causes instability and disruption to the Sun.

- This disruption from the galactic current sheet triggers rare, extremely powerful solar outbursts from the Sun, which the author refers to as a "micronova" event.

- These "micronova" solar outbursts then impact the Earth, causing catastrophic effects like disrupting the boundary between the crust and mantle (the low velocity zone), inducing crustal displacement or rotation changes, generating intense cosmic ray bombardment, and potentially leading to climate changes and ice ages.

So in the author's view, it is the periodic intersection of the solar system with the high-density, magnetically-reversed galactic current sheet that provides the trigger to set off the chain of events culminating in the catastrophic "micronova" solar outbursts that devastate the Earth on a roughly 12,000 year cycle.

pfdietz3• 2 years ago

The interaction with the galactic current sheet will cause a "micronova" event on the Sun, leading to massive solar eruptions and disruptions to the Earth's systems.

This sounds completely implausible.

greenavocado2• 2 years ago

Yeah, I don't really buy it either as the evidence is weak. The author does provide some references to some astronomers and physicists hypothesizing about past "immense solar outbursts" from the Sun, orders of magnitude more powerful than modern events but no specific observations or data are cited.

There is also some discussion of "recurrent novae," faint and fast "dwarf novae," and simulations of triggering mechanisms that could produce nova-level energy releases from stars interacting with phenomena like interstellar dust clouds but I'm not sure if the scales of any of those match what the ancient peoples described or if the simulations results are even plausible.

Still an interesting theory imo.

marcosdumay• 2 years ago

As compared to the galaxy magnetic field inducing change on the Earth's?

The entire thing is ridiculous.

Oh, and that 12k year "geological cycle" (AKA random fluctuations that somebody got famous for mischaracterizing) is the weakest one without any visible consequences. The larger ones are much more interesting.

JumpCrisscross2• 2 years ago

magnetic event is part of a recurring catastrophic cycle that happens roughly every 12,000 years

It's not catastrophic unless you're a computer orbiting near the magnetopause, and it happens "on average once every ~450,000 years" [1].

ancient stories and myths from around the world

The last reversal occured 780,000 years ago. The author is claiming million-year old myths.

the north and south galactic magnetic fields

This isn't a thing [2].

author suggests that the government and elites are aware of this impending disaster and are secretly preparing underground shelters and bunkers

Why would you keep watching...

[1] https://en.wikipedia.org/wiki/Geomagnetic_reversal#Effects_o...

[2] https://www.wtamu.edu/~cbaird/sq/2014/09/03/why-dont-galaxie...

Deep Space Trajectories: Exiting the Heliosphere

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