Question

what did gravity create when 99 percent of the gas

Answer 1

When 99 percent of the gas in a given region of space is influenced by gravity, it typically leads to the formation of various astronomical structures, depending on the specific conditions and the environment. Here are a few potential outcomes of gravitational effects on gas:

1. **Stars**: When a cloud of gas (typically hydrogen) collapses under its own gravity, it can lead to the formation of a star. As the gas collapses, it heats up, and if the temperature and pressure become sufficient, nuclear fusion begins in the core, marking the birth of a star.

2. **Planets**: In a rotating disk of gas surrounding a newly formed star (a protoplanetary disk), gravity can lead to the clumping of material into larger bodies, eventually forming planets.

3. **Galaxies**: Over larger scales, gravity acting on vast amounts of gas and dark matter can lead to the formation of galaxies. As the gas cools and collapses, it can lead to the creation of stars, star clusters, and other galactic structures.

4. **Nebulae**: After stars die, they can expel gas into space, enriching the interstellar medium and forming new nebulae (clouds of gas and dust), which can again collapse under gravity to form new stars and planets.

5. **Black Holes**: In extremely massive gas clouds or the cores of massive stars, the collapse under gravity can lead to the formation of black holes if the mass is sufficient.

In summary, when 99 percent of the gas in a gravitationally significant region is involved, it can lead to the creation of a variety of celestial objects and structures, primarily stars, and subsequently planets, galaxies, and other astrophysical phenomena.