Question

How long does it take for a star to form? Have we seen stars form?

Answer 1

Stars are formed from a cloud of gas and dust in space.They are called nebula.

Explanation:

TIme taken will vary and is in millions of years THe picture shows the time as 50 million,
picture credit physics of the universe.com.
Star formation is taking place in Orion nebula and astronomers are watching it.