galactic disk造句

• Which is spherical and even larger than the galactic disk . the halo consists of old stars , some in the globular clusters , and interstellar matter
  银冕内主要为年老的星，它们有些在球状星团内，有些则在星际物质中游荡。
• As we continue outward into the farthest reaches of the galactic disk , the stars are separated by dozens , then hundreds , of light - years , and the interstellar gas thins out 100 - fold
  当我们继续朝银盘最外沿前进，恒星间的距离从几十光年延长为几百光年，而星际气体则变稀薄100倍。
• Scientists believe that many nearby galaxies harbour intermediate - mass black holes as very luminous x - ray sources , also known as ultraluminous x - ray sources . unlike supermassive black hole in the centre of a galaxy , these ultraluminous x - ray sources usually locate at the galactic disks
  科学家相信，中型黑洞匿藏在许多我们邻近的星系中，向四周发射超强射线，与超重黑洞不同的是，它们并非位于星系中心，而是散布在银盘上。