Scourfield, M. W. J.; Nielsen, E.: Evening (Harang) and morning discontinuities in ionospheric electron drifts and their dependence on the interplanetary magnetic field. Journal Geophysical Research 86, p. 681 (1981)
A star’s chemical composition strongly influences the ultraviolet radiation it emits into space and thus the conditions for the emergence of life in its neighbourhood.
A single star has provided information about the collision of the Milky Way with the dwarf galaxy Gaia-Enceladus. The event likely took place approximately 11.5 billion years ago.