Useful links:
- Sunrise & Sunset calculator for AS Vidojevica site
- Moon phases calendar
- The STScI Digitized Sky Survey
- Astrometry
- CDS Portal - Simbad - VizieR - Aladin - Xmatch
- AAVSO - American Association of Variable Star Observers
- Object visibility calculator - STARALT
- Object visibility calcluator - ASTROUW
- Equatorial coordinates conversion calculator from decimal value to degrees and vice versa (note: put first letter "d" at the beggining of decimal value)