The free-fall time is the characteristic time that would take a body to collapse under its own gravitational attraction, if no other forces existed to oppose the collapse. As such, it plays a fundamental role in setting the timescale for a wide variety of astrophysical processes—from star formation to helio-seismology to supernovae—in which gravity plays a dominant role.
The free-fall time is the characteristic time that would take a body to collapse under its own gravitational attraction, if no other forces existed to oppose the collapse. As such, it plays a fundamental role in setting the timescale for a wide variety of astrophysical processes—from star formation to helio-seismology to supernovae—in which gravity plays a dominant role.
Source: Wikipedia "Free-fall time" · CC BY-SA 4.0
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