Assertion: star's velocity | /r/HasProperty | doubled
Facets:
Source sentences:
text: When all densities are multiplied by 4, orbits are the same; gravitational forces are multiplied by 16 and accelerations by 4, velocities are doubled and orbital periods are halved.
text: if densities are multiplied by 4, times are halved; if velocities are doubled, forces are multiplied by 16.