A1: Its useful for balancing rockets; ever tried to build a shuttle? It can help with having enough thrust to keep your rocket up right but not tip over. A2: It looks quite dark to me, Maybe its your monitor. I had a problem with mine where it was too dark. All i did was change the gamma and it worked. P.S Have you used a modded celestial sphere becuase it looks alot cooler than mine, if so could you send me a Link?