[vincnetas]

but you need a star to explode in order to "spew them into the cosmos".

[warble]

Stars micro-nova too, 'burp' so to speak which sends heavier elements out. It's also a pathway to create heavy elements.

[freemint]

A sufficiently fast and heavy collision with a star might also do the trick but that is a thing we haven't observed.

[wiredfool]

It’s a large universe, so it’s probably happened.

Though it would be cool to see a 9 star rack and one super fast white star heading toward them.

But apparently god does not play pool with the universe.