Thus, stable hole, smooth drilling and tripping operations and zero outage time have been obtained in the construction period.

It had taken the cook, the stable boy, and both of the twins to drag the chests into the yard, where a great hole had been dug under the flagstones close to the servants' latrines.

Without this stable outward pressure, the star collapses, generating a supernova in which the core gets crunched down to form a black hole or a neutron star.