[Styropyro’s] handheld, DIY laser rifle, or Laser Telescope Blaster as he calls it, works for long distances. His solution lies in some surprising physics: the larger the diameter of the beam ...

The answer for [Owen Schafer] was to build it with parts he had lying around and a few strategic purchases. While he was initially planning on using a diode laser, doing anything more than ...

Some examples include better sky coverage by use of laser 'guide stars' (reference ... It is pointless to build a 42-metre telescope and then throw away much of the light because of poor mode ...