Building a simple Galilean telescope (about 9x magnification) To build a simple cardboard Galilean telescope with a magnification of approximately 9x, your materials will need to have the ...

Foil-lined foam insulation board, scraps of lumber, and a paint-thinner can hardly sound like the tools of a radio astronomer. But when coupled with an SDR, a couple of amplifiers, and a fair ...

Since there are plenty of videos of lasers doing that at around a meter, why shouldn’t doing so farther away be easy ... s] handheld, DIY laser rifle, or Laser Telescope Blaster as he calls ...