Sagittarius A*

短语

释义与例句

name
  1. 1.

    The central supermassive black hole of the Milky Way Galaxy.

词源

From being the unseen gravitational centre associated with the astronomical radio source Sagittarius A, the astrophysical radio source associated with the centre of the Milky Way Galaxy. The asterisk * originally symbolized an exciting discovery, by analogy with the symbol's use to denote the excited state of atoms.

来源：wiktionary