http://Skymaps.com - Free monthly sky maps to print out

AAVSO - Web site of American Association of Variable Star Observers, worlds largest variable star organization. 

Astronomical League  - The world's largest federation of amateur astronomers.  Includes list of observation clubs,  observing aids, and information about other amateur astronomy groups.

Astronomy Magazine -  An excellent web site for beginning or intermediate amateur astronomers.

I.O.T.A. - International Occultation Timing Association web site of Lunar and Planetary occultation and grazes.

International Dark Sky Association - Home page of the non-profit organization to promote dark skies for all astronomers.

http://www.delmarfans.com/educate/basics/lighting-pollution/ - A great site for discussing light pollution.

Another article on light pollution: https://usinsuranceagents.com/light-pollution-life-driving-car-health-home

Mid-States Region of the Astronomical League: List of other Astronomical League regional clubs.

Sky Publishing -  Publisher of Sky & Telescope magazine, with lots of up-to-date information  on  sky events and late breaking news for the amateur astronomer. 

Spaceweather.com - Science news and information about the Sun-Earth environment.  Very nice.

Heavens-above.com - They provide you with all the information you need to observe satellites such as the International Space Station and the Space Shuttle, spectacular events such as the dazzlingly bright flares from Iridium satellites as well as a wealth of other spaceflight and astronomical information

Astro photrography web site -  http://www.cctvcamerapros.com/Astronomical-Cameras-Astrophotography-Guide-s/605.htm