早型O，B型星有扩散运动和自转运动，而晚型发射线星则没有明显的扩散或收缩的整体运动。
The expansion and rotation of the early O, B type stars have been found, but the similar motions are not discernible for the late-type stars.
文中的表1包括100个发射线天体，其中的96个是发射线星系；其余的对象有3个行星状星云，1个发射线星。
We find a total of 100 emission-line objects, of which 96 are galaxies, the rest being 3 planetary nebulae and 1 star.
当伴星物质陷落到中子星上时，它就发射出X射线。
天文学家还探测到有一些较老较小的M型星，它们发射的X射线实际上比太阳更加光辉灿烂，而先前人们却认为它们是十分幽暗的。
Astronomers have also detected older and smaller m stars, previously thought to be quite dim, that actually outshine the sun in their X-ray emission.
天文学家还探测到有一些较老较小的M型星，它们发射的X射线实际上比太阳更加光辉灿烂，而先前人们却认为它们是十分幽暗的。
Astronomers have also detected older and smaller m stars, previously thought to be quite dim, that actually outshine the sun in their X-ray emission.
应用推荐