Actual Infinity in Reality?

[Whateverist]

Yes, of course, it is *logically* possible. There is no internal contradiction to the concept of an actual infinity.

Now, I don't know if you consider time to be abstract or concrete, but there is certainly no internal contradiction to the concept of an infinite time.

There is also no contradiction in the possibility of an infinite number of stars in our universe if the universe is infinite in spatial extent.

My naive intuitions balk more at the idea of a first moment than at the idea that there will always be another moment before any moment you choose.  To insist that there was once a brand spanking new, first ever moment before which there was no before .. certainly requires a lot of support.