11.   As a massive object collapses, its gravitational field grows more intense.

12.   As a star becomes denser and more compact, its gravitational field intensifies, causing it to contract even more.

13.   As Leo, a borderline case trying not to get sucked back into a malignant gravitational field, he gets the job done with reticence and watchfulness.

14.   At first the galaxies sideswipe each other, their gravitational fields tearing off streamers of stars and nebulae tens of thousands of light-years long.

15.   But sound waves are also accelerated by strong gravitational fields, such as exist in the area of surface disturbances.

16.   But they no longer raise red flags to the actor no longer faced with trying to escape their gravitational field.

17.   Confined in the lattice, the ions would begin to rapidly spin, causing each to create a minuscule gravitational field.

18.   Comets have a tiny gravitational field because their nuclei are only tens of kilometers across, so a normal probe would have to latch onto the comet.

19.   Fortunately, the Earth is small and its puny gravitational field is trivial, compared with those of Jupiter or the sun.

20.   Once an ordinary neutrino changed into a sterile neutrino, it would essentially disappear from the universe, except for its minuscule gravitational field.