On the other hand, since the trigger is pulled at the very center of the star, it is difficult to accurately countdown the start of a supernova explosion only from external observations. (alma-telescope.jp)
Be gentle and don't go past the center of the star anise when making the hole or it will break. (fb101.com)
Once this fuel is used up, however, the remaining matter is crushed into the center of the star, which becomes a white dwarf. (discovermagazine.com)