A galaxy
A globular cluster is a densely packed spherical collection of stars held together by gravity. They typically contain hundreds of thousands to millions of stars, making them appear as bright, compact, and symmetrical groupings when seen from Earth.
A spoon and a fork put together is called a spork.
Gravity put all matters of the Universe together, Stars, Galaxy, Nebulae and many other things.
medow They grow together in a meadow. They are put together in a bouquet.
When an alkali and an acid are put together, it is called a neutralization reaction. This reaction results in the formation of water and a salt.
The Universe
Structure
It is called an Ellipsis and looks like this ...
two or more atoms put together is called a molecule.
Compound
Recycling :-)
it is called a connection