NASA Finds Bright ‘Hydrogen Wall’ Around Our Solar System

Christopher Davidson
August 13, 2018

In the journal Geophysical Research Letters, the Nasa scientists wrote: 'Long‐term observations made with the Alice instrument on the New Horizons spacecraft confirm measurements made 30 thirty years earlier with the Voyager spacecraft.

HELLO FROM THE OTHER SIDE The sun's journey through the galaxy may build a wall of hydrogen near the edge of the solar system (curved line to the left of this illustration). The mass of interstellar issue here is small yet sufficiently strong enough to the solar winds to go through.

David McComas, an astronomer from Princeton University who was not involved in the study, explains that if the collected data could distinguish the hydrogen wall, scientists could eventually figure out the shape and variability of the galaxy's boundary. In the meantime, it isn't so solid to bust through the solar wind develop.

The sun keeps throwing out jets of matter and energy in the form of solar winds. They travel a long ways past the circle of Pluto.

Just beyond the edge of that bubble, around 100 times farther from the sun than the Earth, uncharged hydrogen atoms in interstellar space should slow when they collide with solar wind particles.

That build-up of hydrogen, or wall, should scatter ultraviolet light in a distinctive way.

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The Solar System's boundary is a hard-to-define location-after the end of the solar wind's influence, there's still the theorised Oort cloud, an icy sphere of comets orbiting the Sun a third of the way to our nearest neighbouring star.

The Sun's light sends charged particles outward, causing hydrogen particles in the space between planets to release characteristic ultraviolet light.

According to the study, the New Horizons probe detected a strong front of UV light at the edge of our solar system, well above what should be there if there was no "hydrogen wall", reports Science News. An examination of the most recent confirmation accumulated by New Horizons was distributed by the NASA researchers recently.

The researchers point out that "this distant source could be the signature of a "wall" of hydrogen, formed near where the interstellar wind encounters the solar wind", or it could be coming from deeper in the galaxy. Along the way, it's been regularly scanning the sky with its Alice ultraviolet spectrograph.

As it speeds away from the Sun, the New Horizons mission may be approaching a "wall".

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