As the centre of that cloud became denser and denser, its gravitational field strength grew and grew, and so the collapse spiralled in a runaway.

Source: https://metro.co.uk/2023/09/10/an-asteroid-is-heading-for-earth-and-other-fun-space-rock-facts-19468509/

Similarly, there is also the ‘time field’ that Einstein called the gravitational field.

Source: https://www.thehindu.com/sci-tech/science/universe-may-have-resulted-out-of-a-big-bounce-carlo-rovelli/article67521598.ece