Notebook

  1. Physics

    STEVE the aurora makes its debut in mauve

    A newly discovered type of aurora is a visible version of usually invisible charged particles drifting in the upper atmosphere.

    By Emily Conover
  2. Astronomy

    New Horizons’ next target has been dubbed Ultima Thule

    NASA has named New Horizons spacecraft’s next target Ultima Thule after the public suggested tens of thousands of monikers for the Kuiper Belt object.

    By Mike Denison
  3. Astronomy

    50 years ago, pulsars burst onto the scene

    Thousands of pulsars have been discovered since the announcement of their detection 50 years ago.

    By Emily Conover
  4. Animals

    In a pack hunt, it’s every goatfish for itself

    Pack hunting among goatfish is really about self-interest.