Interesting post, but I suspect we will probably be long gone, as a species, before any of this becomes a problem...
Thanks for posting !
"Observations of a few astrospheres have shown bow shocks around those stars, but IBEX has shown that our star has a fundamentally different environment surrounding it," says Christina Prested (Boston University), a Nasa IBEX scientist not involved in the published study. "These results are very exciting as we can now definitively say what it's like in the neighborhood of our solar system."
-May 10, 2012
The protective bubble around the sun that helps to shield the Earth from harmful interstellar radiation is shrinking and getting weaker, Nasa scientists have warned.
New data has revealed that the heliosphere, the protective shield of energy that surrounds our solar system, has weakened by 25 per cent over the past decade and is now at it lowest level since the space race began 50 years ago.
"Around 90 per cent of the galactic cosmic radiation is deflected by our heliosphere, so the boundary protects us from this harsh galactic environment."

...Astrophysicist Alexei Dmitriev says that both Voyager 1 and Voyager 2 satellites reveal that our sun, as well as our entire solar system, is now moving into an interstellar energy cloud.
Opher, a NASA Heliophysics Guest Investigator from George Mason University says this interstellar energy cloud is turbulent.
Dmitriev explains that this cloud of energy is exciting the atmospheres of our planets and especially our sun. As this interstellar energy cloud continues to excite/charge the sun, it causes the sun to become more active/violent, resulting in greater output from the sun. IE: Bigger and more frequent solar storms and CME's resulting in the Carrington effect.
This interstellar cloud of electrical energy is also absorbed by the Earth, and scientist have found that it results in more earth quakes, all while dramatically effecting our weather here on earth. When asked how long will it take our sun to pass through this interstellar energy cloud, Dr. Dmitriev replied, "I don't know. But If I had to guess, I would say somewhere between two thousand to three thousand years." This interstellar cloud is a wispy band of charged particles through which our solar system is slowly moving through.
...It turns out that our solar system is moving nearly 100,000 m.p.h. faster than previously thought — revolving around the center of the Milky Way at 568,000 m.p.h., announced Mark Reid of the Harvard-Smithsonian Center for Astrophysics...
Originally posted by St Udio
the 'cloud' has to be some element like hydrogen or helium, but the hype says it is hot as plasma and charged electrons (electricity)...my BS meter is going ding-ding-ding
besides...do the math... the Solar System orbiting at 568,000 MPH for 2,000 years means this 'cloud' is some +1 or so light years big - (~9 trillion miles equal 1 LY)
--UNbelieveable !
9,951.360,000,000.miles minimum
Astronomers call the cloud we're running into now the Local Interstellar Cloud or "Local Fluff" for short. It's about 30 light years wide and contains a wispy mixture of hydrogen and helium atoms at a temperature of 6000 C. The existential mystery of the Fluff has to do with its surroundings. About 10 million years ago, a cluster of supernovas exploded nearby, creating a giant bubble of million-degree gas. The Fluff is completely surrounded by this high-pressure supernova exhaust and should be crushed or dispersed by it.
"The observed temperature and density of the local cloud do not provide enough pressure to resist the 'crushing action' of the hot gas around it," says Opher.
So how does the Fluff survive? The Voyagers have found an answer.
"Voyager data show that the Fluff is much more strongly magnetized than anyone had previously suspected—between 4 and 5 microgauss*," says Opher. "This magnetic field can provide the extra pressure required to resist destruction."
Our solar system's journey through space is slower and heading in a different direction to what was previously thought, according to new data.
IBEX principle investigator, Dr David McComas from the South West Research Institute in Texas, and colleagues calculated the speed of the heliosphere with respect to the interstellar medium as 23.2 kilometres per second - significantly less than the previous estimate of 26.3 kilometres per second.
They also determined that the heliosphere's interstellar interaction is weaker and more magnetically dominated than previously thought.
McComas and colleagues say this explains the lack of a bow shock, where the interstellar medium abruptly slows before hitting the heliosphere.