![]() ![]() 'How is this relevant for society? The bubble that surrounds us, produced by the sun, offers protection from galactic cosmic rays, and the shape of it can affect how those rays get into the heliosphere,' said astrophysicist James Drake of the University of Maryland. Named because they have equal amounts of positive and negative charge, therefore carrying no charge at all, these particles make the heliospheric jets unstable and cause them to bend inwards. Now a study led by Boston University has found the reason why this heliosphere is shaped into a pastry-like form, and it's all to do with neutral hydrogen particles from interstellar space. Twin jets of material – known as heliospheric jets – emanate from the sun's poles but, rather than shooting straight out, they curve round to form the solar system's tails and look like the points of a croissant. ![]() The heliosphere is created by wind and radiation from the sun as it streams outwards into interstellar space.
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