I know this is a digression but can somebody tell me what happened yesterday? Bear with me because I'm not much of a lawyer and I don't get a lot of time to do

I know this is a digression but can somebody tell me what happened yesterday? Bear with me because I'm not much of a lawyer and I don't get a lot of time to do my original research so I just get it from TV. I'm flabbergasted that the SC was 9-0 in their decision. I guess I just don't understand. I thought the lower courts had applied the ban unanimously and it was made in accordance with the law. Is there a way to challenge yesterday's decision further?