[quote=The15thSpycrab]
I hate to criticize your storytelling, but I'm pretty sure that if you sent a planet destroyer nuke at an enemy closer than the moon, bad things will happen to the earth. Space battles hopefully take place much farther out.
[/quote]

Thats why Planey Destroying nukes aren't happening here. 

Those are there for something like the neutralization of a crucial enemy planet. There is a purpose to the proximity of the battle, and keep in mind there are thousands of ships here. They probably cover a pretty massive area. 

Also if you look at Star Wars, or Halo, or Star Trek. There have been space battles in very close proximity to the planets. Including scraping the Atmosphere. Bear with me, my friend. There is a method to the Ship-Breaking-Through-The-Freakin-Moon madness