Question

How do stars contribute matter to space that can be used to form planets

Answer 1

The dust around a star is critical to forming celestial objects around it. Dust around stars contains elements such as carbon and iron which can help form planetary systems.

Answer 2

planets are formed around a new star by condensing in a disc of molecular gas and dust, embedded within a larger molecular cloud. Condensation increases until they become giant planets, which are heated, then cleanse their orbits in the disc and possibly bend it.