ThisNASAhandoutimageshowedasuperdense（超密的）neutronstar（中子星）leftbehindbythestar'sdeathoverathousandyearsago,nowseenspewing（噴出、放出）outablizzard（風暴）ofextremelyhigh-energyparticlesintotheexpandingdebris（殘骸）fieldknownastheCrabNebula（蟹狀星雲）.ThiscompositeimageusesdatafromthreeofNASA'sGreatObservatories.Theneutronstar,whichhasthemassequivalenttothesuncrammed（塞滿）intoarapidlyspinning（旋轉的）ballofneutronstwelvemilesacross,isthebrightwhitedotinthecenteroftheimage. AFP