On the morning of 18 November 2014, two Palestinian men from Jerusalem entered Kehilat Bnei Torah synagogue, in the Har Nof neighborhood of Jerusalem, and attacked the praying congregants with axes, knives, and a gun.
A single, simple sentence like this is, in some ways, much more complex than a star. A longer text, like a short story or novel, is more complex than a galaxy or even an entire universe of non-biological phenomena.