Here's how it works:
* Gravitational Attraction: Every particle of matter in the universe exerts a gravitational pull on every other particle. While this force is very weak between individual dust particles, in a large cloud of dust, the combined gravitational pull of all the particles becomes significant.
* Density Fluctuations: Within these clouds, there are regions where the density of dust is slightly higher than average. These denser regions have a slightly stronger gravitational pull, attracting more dust particles.
* Accretion: As more dust particles are drawn in, the denser region becomes even denser, increasing its gravitational pull even further. This cycle of attraction and accretion continues, causing the cloud to collapse in on itself.
* Star Formation: As the cloud collapses, the matter within it heats up due to friction and compression. Eventually, the core of the collapsing cloud reaches a temperature and pressure high enough for nuclear fusion to begin. This process, where hydrogen atoms fuse into helium, releases immense energy, marking the birth of a star.
So, gravity acts as the primary force that pulls matter together in space dust clouds, leading to the formation of stars.
