Page "Helium" Paragraph 32

Most extraterrestrial helium is found in a plasma state, with properties quite different from those of atomic helium.

In a plasma, helium's electrons are not bound to its nucleus, resulting in very high electrical conductivity, even when the gas is only partially ionized.

The charged particles are highly influenced by magnetic and electric fields.

For example, in the solar wind together with ionized hydrogen, the particles interact with the Earth's magnetosphere giving rise to Birkeland currents and the aurora.