A galaxy
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.
two or more atoms put together is called a molecule.
The Universe
Check
Structure
Neutrilisation
Three periods put together are called an ellipsis, often used to indicate an omission of words or a pause in writing.
Compound
it is called a connection
It was called Pangaea.