Usefull ones as I see it

The 88 Constellations and Their Brightest Stars.

Astronomy Picture of the Day.

The essential Magazine of Astronomy.

J-P Metsavainio astro homepage.

Cloudy Nights Telescope Review, Acticles, Forum, ... .

A more detailed DK weather forecast can be found here.

Realtime satellite images, visual and in infrared.

Some examples, 16-LX200, ap-gto, ap-ug, apogee, ASA_AstroSystemeAustria, ASCOM-talk, AstroArt, Canon_DSLR_Digital_Astro, ImagesPLus, MaxImDL, SBIG and many more.

Relevant astro imaging techniques shown in the reviews folder.

Please check out this web site. Some of my best astro pictures are now placed on astrobin.com.