AstronomyLinks


Astronomical Telescope Eyepieces: A Discussion for the Beginner
http://observers.org/beginner/eyepieces.freeman.html
Recommends starting with eyepieces of magnification one-fifth of the telescope aperture, and equal to the telescope aperture. So for the SMIC 220mm telescope, that's about 40mm and 200mm. (EDIT: no that's wrong, it should be magnification, so about 40x and 220x. For my current 150mm reflector w/focal length of 750mm, that would be 150x or 5mm, and 30x or 25mm. The scope came with a 25mm eyepiece.)

Observation planning
http://www.aerith.net/comet/weekly/current.html
http://www.heavens-above.com/
http://www.ar-dec.net/vsa/
http://www.popastro.com/phpBB2/search.php?search_author=Dave+Mitsky

Forums
http://www.popastro.com/phpBB2/index.php
http://www.cloudynights.com/ubbthreads/ubbthreads.php?Cat=
http://cs.astronomy.com/asycs/forums/
http://www.iceinspace.com.au/forum/index.php
http://stargazerslounge.com/

Education
http://www.csun.edu/science/geoscience/astronomy/
http://aas.org/education/EducatorResources
http://www.ellejet.com/jets-observing-the-skys.php
http://www.iop.org/resources/videos/education/classroom/astronomy/page_51897.html
http://educatorlabs.org/resources/listing-category/astronomy/

Misc
紫金山天文台-创新团组 - http://159.226.71.170/