quark star造句

"quark star"是什么意思   


  1. Though some ideas of quark stars were proposed as early as in 1969 , no great progress had been made until the 1980s
  2. Such sources are believed to be either quark stars or neutron stars , and a subclass of these are already observed by conventional means as pulsars or x - ray emitting celestial objects
  3. Gravitational waves are ripples in the fabric of space and time produced by events in our galaxy and throughout universe , such as black hole collisions , shockwaves from the cores of exploding supernovas , and rotating pulsars , neutron stars , and quark stars
  4. It's difficult to find quark star in a sentence. 用quark star造句挺难的


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