• The mystery of solar nanoflares

    Nanoflares are eruptions on the Sun which are billion times less energetic than ordinary flares but still have the power that belies their name. They appear as little brightenings of the solar surface at extreme ultraviolet and X-ray wavelengths and they might solve a l

  • NuSTAR discovers first ultraluminous pulsar, impossibly bright dead star

    Astronomers working with NASA's Nuclear Spectroscopic Telescope Array (NuSTAR) have found a pulsating dead star beaming with the energy of about 10 million suns. The object, previously thought to be a black hole because it is so powerful, is in fact a pulsar – the

  • Flare from giant black hole captured by NuSTAR

    NASA’s state-of-the-art telescope NuSTAR (Nuclear Spectroscopic Telescope Array) captured image of a giant black hole in center of the Milky way. NuSTAR, launched June 13, is the only telescope capable of producing focused images of the highest-energy X-rays. The