存在于动物细胞和低等植物细胞中，由蛋白质组成。 动物细胞有丝分裂时中心体放出的射线，用于包围染色体。多数植物细胞没有星射线，某些低等植物有星射线从中心体发出。
物理学画线射星 Starfire Puzzler
X射线双星 X-ray binary ; X-Ray Binaries ; XRB
射线双星 LMXBs ; HMXB ; Low Mass X-ray Binary ; X-Ray Binaries
发射线星系 emissionlinegalaxy ; emission-line galaxies
X射线新星 X-raynova
射影星形线 [数] projective astroid
发射线星 emission line star
蓝发射线星系 blue emission line galaxies
射线星系 Narrow-Line X-ray Galaxies ; NLXGS
从可见光扩展到无线电波，再到 X 射线和伽马射线，天文学总是会发现不寻常的物体，如射电星系、类星体和脉冲星。
The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars.
这是探测进动的关键，因为在每次遮挡期间天文学家们可以确定放射线信号的精确角度，并因此断定脉冲星的抖动时间。
That's key to detecting precession, because during each eclipse astronomers can determine the precise angle of the radio signal and therefore the pulsar's wobble over time.
鉴于脉冲星规律的射电及X射线脉冲并未发生改变，因此学者们怀疑波动源自于星云的内层。
Since the pulsar's regular radio and X-ray pulses have not altered, researchers suspect that the fluctuations originate in the inner portion of the nebula.
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