not getting any refraction, i need a fix

This is a material i was making for a Black hole. Everything works except the refraction, anyone mind helping me out, i want the area around the black ball to be curved and refracted

you should have said “This is the tutorial I followed made by Bolton”

and it works fine btw,

just dont plug anything into emissive if you dont need it.

sorry was frustrated and didnt think about stating that