According to NASA, the New Horizons Spacecraft developed by them can see a vast wall which is formed from hydrogen and is visible at the very edge of this solar system. This hydrogen wall which was spotted can be called as the outermost boundary of the solar system and it is the place where the bubble of solar winds that is formed because of the interference of the sun, ends. This wall is formed by some specific characteristics of the sun and the presence of the elements in the space has a significant role to play here.
The jets of energy and matter, after leaving the sun, flow outward and for a really extensive stretch, as far as the orbit of the lost planet Pluto or even beyond. But at some point, these jets get diminished and their capacity to thrust all the stuff that is floating within the walls of our galaxy declines. These things cause a visible boundary to form which has the solar wind vestiges on one side and a buildup of matter on the other side, which also contains hydrogen.
According to a research paper published on August 7, the New Horizons Spacecraft saw some Ultraviolet light in ample quantity, greater than the usual. This light is expected to be produced by a wall of galactic hydrogen, if the researchers are to be believed. The researchers also said that there is no guarantee that these are formed by the hydrogen wall only and that they can be formed from another source, deeper in the galaxy.
Speaking of NASA, the organization is planning for a mission that will require going really close to the host star of our solar system: the Sun. The NASA spacecraft that will assist in the mission is named after the 91-year-old astrophysicist Eugene Parker.