STARS
A star
The answer is simple: gravity.
a region of burning gases
It is due to surface tension. Surface tension is only for liquids. Due to surface tension surface energy is to be minimized only reducing the area. For a given volume sphere has minimum surface area. Hence spherical shape.
The sun
Hydrogen, helium and oxygen are gases. Gravity is a physical property of any substance.
The answer is simple: gravity.
Gravity mainly
Gases are not restricted by gravity, so the molecules fly around, rather than stick together.
The sphere of earth which contains gases is called the Atmosphere.
A Nebula! :D!
a region of burning gases
there are so many gases
A protostar forms when gravity pulls the dust and gases in a nebula together.
No. The outer planets do not have solid surfaces. Those planets are made of gases held together by gravity.
It is due to surface tension. Surface tension is only for liquids. Due to surface tension surface energy is to be minimized only reducing the area. For a given volume sphere has minimum surface area. Hence spherical shape.
gasses
No it does not.