Optical collimation aligns a telescope’s optical surfaces to bring ... Star test: A star test is free, easy, and works with any type of telescope. The only disadvantage is that not all nights ...

Stargazers can learn about how to look into the heavens as the York County Astronomical Society will present programs on solar and radio astronomy and a telescope clinic. The free public event ...

Figure 2: Demonstration of guiding and collimation of high-density MeV electrons ... and control the high energy-density particles are free from any damage threshold of the bulk modulus of the ...