the guy's name is Avwave, I suggest you know who to credit next time.
something about this render looks wrong, probably because for some reason, the shine is on the side not facing the sun.
for me, this suggests one of two things.
1. you just rendered a tori, and slapped it onto an image you stole.
2. you have a light behind your render, that is causing for odd shines.
I'm guessing for the later of the two.
the earth looks a bit generic, and not 3d, while the moon's specular looks way too shiny, the sun could've easily been done with a single light, and a lense effect.
aside from that, I haven't seen much else from you, so it's hard to judge if you're improving at all.
sorry if this comment seems harsh, but I ensure you I'm only trying to help.