Liang, Z.-C.; Gizon, L.; Schunker, H.; Philippe, T.: Helioseismology of sunspots: defocusing, folding, and healing of wavefronts. Astronomy and Astrophysics 558, A129 (2013)
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.