space-timefabrics是关于太空的.Ofthese156,000,000,000starsabout7,000,000aresmallerandlargersolarsystems,whichhaveplanetsandplanet-planetsuponwhichhigherlifeissupported.还有这段话里的planet-planets

Question

space-time fabrics
是关于太空的.
Of these 156,000,000,000 stars about 7,000,000 are smaller and larger solar systems,which have planets and planet-planets upon which higher life is supported.
还有这段话里的 planet-planets

Answer 1

planet-planets根据意思,就是行星的行星,即卫星,比如地球是一颗行星,她的“行星”就算卫星-月亮 .而space-time fabrics是太空的组织构成.