Blader door items (166 in totaal)

A variable star is a star whose brightness as seen from Earth (its apparent magnitude) fluctuates. This variation may be caused by a change in emitted light or by something partly blocking the light, so variable stars are classified as either

The field of astrophysics is in the midst of a technologically driven renaissance, as fundamental discoveries are being made with astonishing frequency. In the last decade, new detectors in space, on earth, and deep underground have, when coupled…

  Variable stars are those that change brightness. They come in many varieties, but each one provides important information about the star: its properties, its internal structure, and its evolution. This book provides a concise overview of variable…

In dit handboek leert de amateur-astronoom wat hij van zijn telescoop kan verwachten; het geeft gedetailleerde instructie over het slijpen en polijsten van telescoopspiegels en het bouwen van een telescoop.