The top six levels of upper management of the company I work for.
I was not sure about the stars, but the gas and dust gave it away.
gravity
A system of billions of stars held together by gravity is called a galaxy. The one we live in is called the Milky Way galaxy.
Gravity keeps the planets in orbit around the sun and the stars and the stars in orbit around the center of the galaxy. Gravity also holds the stars together against their own internal pressure.
An island comprising billions of stars and nebulae, held together by gravity.
A group of stars, dust and gases held together by gravity IS CALLED GALAXY
Gravity
gravity
The answer is simple: gravity.
A system of billions of stars held together by gravity is called a galaxy. The one we live in is called the Milky Way galaxy.
Gravity basically makes things come together, and keep together. For example, due to gravity: * Galaxies form and keep together * Stars form and keep together * Stars get hot enough for nuclear fusion to start * Planets form and keep together * Planets keep around their stars, instead of wandering off into space
Gravity keeps the planets in orbit around the sun and the stars and the stars in orbit around the center of the galaxy. Gravity also holds the stars together against their own internal pressure.
a cluster
GRAVITY!
Their own gravity keeps them together.
Yes, stars are born when gravity pulls gas and dust together from a nebula.
stars are massive luminous ball of plasma that is held together by gravity
Stars.