NASA s spacecraft New Horizons has found new evidence of a "wall" of hydrogen at the edge of the solar system, encircling all the planets and objects orbiting the Sun.
The "wall" is actually a vast amount of trapped hydrogen atoms caught up in the solar wind, which produce waves of ultraviolet (UV) light and have been detected by the sensors aboard New Horizons, according to NASA.
The phenomenon was first glimpsed by astronomers around 30 years ago, and was called helisphere. However, evidence supporting the theory has remained murky.
New Horizons has been using its on-board detector, known as "Alice", to look for traces of the celestial interaction. It picked up UV rays with "Alice" seven times from 2007 to 2017, and finally found evidence to verify earlier observations.
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