• The Quantum Guide – Pulsars

    A pulsar is a neutron star that emits beams of radiation that sweep through Earth’s line of sight. Like a black hole, it is an endpoint to stellar evolution. The “pulses” of high-energy radiation we see from a pulsar are due to a misalignment of the neutron star’s

  • Traces of Japan nuclear fallout in California rainwater

    Low levels of radioactivity showed up in rainwater in northern California two weeks after the Japan nuclear disaster in March but soon returned to normal, said a US study out Wednesday.The detected levels of radioactive isotopes cesium, iodine, and tellurium were