Artificial

I like the colors. The orange and greenish blue go nicely together, and there isn't too much of either. Her clothes are nicely designed, and the planet in the background is sufficiently pretty. Of course it's not very different from all of those other thousands of photoshopped planets out there, but there are no flaws either. If the point was following a tutorial, it's definitely been a success.

What I don't like the most is the reflection. You should've at least shifted the different parts horizontally to make it seem more realistic, and some soft erasing off the edges wouldn't have probably hurt either. The picture also lacks some sort of a transition between foreground and background, so they kind of look like they don't belong to the same image. The style isn't too different, but adding some mechanical stuff to the foreground around the glassy window would've probably made it seem more natural. Her very accurately drawn pose helps, though, and the big window has it's own kind of appeal.

It's hard to say which really is better. Perhaps a better option would've been to add some more reflections to the glass - there must be some kind of light sources inside too, right? This would've probably been quite hard to do right without messing up the beautiful composition of the picture, but it is something to try.