Richter, K.; Curdt, W.; Keller, H.-U.: Velocity of individual large dust particles ejected from comet P/Halley. Astronomy and Astrophysics 250, pp. 548 - 555 (1991)
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.