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Thu Aug 9, 2018, 08:13 PM

NASA Spotted a Vast, Glowing 'Hydrogen Wall' at the Edge of Our Solar System


By Rafi Letzter, Staff Writer | August 9, 2018 04:55pm ET

There's a "hydrogen wall" at the edge of our solar system, and NASA scientists think their New Horizons spacecraft can see it.

That hydrogen wall is the outer boundary of our home system, the place where our sun's bubble of solar wind ends and where a mass of interstellar matter too small to bust through that wind builds up, pressing inward. Our host star's powerful jets of matter and energy flow outward for a long stretch after leaving the sun far beyond the orbit of Pluto. But at a certain point, they peter out, and their ability to push back the bits of dust and other matter the thin, mysterious stuff floating within our galaxy's walls wanes. A visible boundary forms. On one side are the last vestiges of solar wind. And on the other side, in the direction of the Sun's movement through the galaxy, there's a buildup of interstellar matter, including hydrogen.

And now NASA researchers are pretty sure that New Horizons, the probe that famously skimmed past Pluto in 2015, can see that boundary.

What New Horizons definitely sees, the researchers reported in a paper published Aug. 7 in the journal Geophysical Research Letters, is some extra ultraviolet light the kind the researchers would expect such a wall of galactic hydrogen to produce. That replicates an ultraviolet signal the two Voyager spacecraft NASA's farthest-traveling probes, which launched in the late 1970s spotted all the way back in 1992. [Images: Dust Grains from Interstellar Space]

https://www.livescience.com/63297-hydrogen-wall-glowing-interstellar-space.html?utm_source=notification

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Reply NASA Spotted a Vast, Glowing 'Hydrogen Wall' at the Edge of Our Solar System (Original post)
Judi Lynn Aug 2018 OP
LakeSuperiorView Aug 2018 #1

Response to Judi Lynn (Original post)

Thu Aug 9, 2018, 08:35 PM

1. Was it paid for by the Alpha Centaurians?

 

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