Two or three million years ago, our solar system collided with a cloud of gas and dust floating between the stars. The “collision” wasn’t as brutal as a meteorite, but it might have been enough to disrupt the bubble surrounding the sun and its planets.
We call this bubble Solar atmosphere:Perhaps extending three times the distance between the Sun and Pluto – the farthest planet – this bubble represents the area of influence of our Sun.
protective bubble
Outside its “boundaries”, the radiation emitted by the Sun (the “solar wind”) is replaced by cosmic rays emitted from the rest of the galaxy. Thus, the heliosphere simultaneously provides protection against cosmic radiation, some of which is much stronger than that emitted by our Sun.
However, scientists know very little about the interactions between the heliosphere and the “outside world”. The only direct data comes from probes. For travel 1 and 2 from, Since 2010shas reached the region of this “final frontier” of our solar system.
counterparts from abroad
On the other hand, there is indirect data, which is what a team of researchers points out. study Published in the magazine Astronomy Nature.
First of all, we have long detected, almost everywhere on Earth and even on the Moon, an abnormally high amount of certain isotopes of iron and plutonium (i.e. atoms that contain a different number of neutrons than other iron and plutonium atoms).
