https://phys.org/news/2019-10-pressure-high-edge-solar.html When the pioneer spacecraft neared the edge of the solar system it caught everybody by surprise, because it suddenly slowed down for a while and, then, sped right back up as it left the solar system. They quickly discovered that the solar system is surrounded by an electromagnetic field, sort of a huge collection of hexagons. This newest evidence indicates that sound can travel through it about a thousand times faster than air, indicating it is dense as hell. Not exactly impenetrable like the Star Trek force field surrounding the galaxy, but impressive nonetheless. The solar wind blows at about a million miles per hour, pushing on the inside of the force, while cosmic rays blow their own galactic version from the outside, creating the pressure density. Without this force field, we'd have much more cosmic radiation bombarding the earth and frying everything. The earth itself has its own force field, in the Van Allan Belts, which have only recently been described well, because they are dynamic as hell and constantly connecting and breaking electromagnetic connections between them as they dance in the solar wind, producing the auroras of the northern lights among other things. Space and the deep oceans are two of the biggest frontiers left to be explored and, although its tempting to think it just gets colder and darker the deeper you go in the ocean, its not true, and space is turning out to be just as complicated and filled with unique phenomena. At about 70,000ft up in the atmosphere where its normally around -70f and low enough air pressure to be practically a vacuum from our point of view, there is a 15 foot layer of almost 70f and sea level air pressure, and every frontier seems to have such strange phenomena. At around 110 feet down in the ocean, divers tend to rip their masks off and die for unknown reasons. The pioneer spacecraft is the fastest man made object, traveling at 28,000mph, while a bit under 100,000mph is the fastest anything in solar system goes. At the rate it is traveling, it will require 30,000 years just to clear the Ort cloud surrounding the solar system and get about 1/3 of the way to the nearest star, Alpha Centauri.