Crashed while placing a pressure pipe block that wasn't even close to a reactor... I have no idea if space had anything to do with it.

http://paste.ubuntu.com/8021599/

Happened in a Galacticraft asteroid field, no oxygen. Reactor was spread across multiple chunks, with a cyanite re-processor on top of a power tap. Though they didn't crash when I placed them, mekanism pipes, extra util transfer nodes, and pressure pipes were all involved... :D.

Editing myself back to the overworld let minecraft start, but any attempt to go back to my reactor crashes it again. Rockets even crash half-way through the countdown, I assume they preemptively chunkload the area.

http://paste.ubuntu.com/8021749/

I like to be thorough, so here's my whole forge log folder!
http://s000.tinyupload.com/index.php?file_id=08731474678877386298

Other mods include everything from Bevo's Techpack
http://www.atlauncher.com/pack/BevosTechPack/

BR X5, and Galacticraft 3.

Just to clarify, this crash happens when a reactor tries to push cyanite out.