astronomer related online links
star chart and solar system
phase of the Moon
- This interactive telescope
calculator is designed
to give answers to commonly asked questions
about a given instrument's performance when
changing eyepieces and accessories.
Curtesy from NightSkies
and geometric optics
how light will defract on any type of lens and mirror.
Combine lenses, change aperture, size, thickness,
of Physics Lab
Your sky tonight live!
More coming soon!
Astrophotography, info about telescopes, software,
tips & tricks, homemade scopes and lenses etc.