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.
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。
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Gamma-ray bursts (GRBs) are short, sudden and intense flashes of gamma rays from the cosmos distance, the study of which is a hot topic in astronomy and astrophysics.