Hello everyone. I'm fairly new to bonsai and have some questions regarding my tree. I have a juniper, I believe. I was out of town last week and when I left for vacation my tree seemed perfectly healthy and green. I've had the tree for about four years and it's been pretty hardy and not too fussy at all in that time. I usually give it a bit of water everyday but have gone days without watering it before and it was perfectly fine. I've also left it just sitting where it always sits in my apartment for beyond a week and it has been fine those times too. However, when I came home yesterday after being gone for five days I discovered my tree to be a mostly brownish/gray color, with some vibrant green near the extremities, and the trunk seems to be fine though. I'll post some pics here. I live in Chicago, where it's been cold, and I'm wondering if the radiators blasting for days really dried it out or something. My other plants don't look to happy either. I guess I'm wondering whether or not my tree is dead and if it is not, what to do. Thanks in advance for any help.