Since 2002 the IAYC has been held Germany and the Czech and Slovak republics . The number of participants has changed over the years . In the first year , just more than 40 people attended the camp . In 1999 , in which the solar eclipse of that summer was a major event , 99 people participated , excluding former participants of previous camps who joined for a one-week old-oldies special reunion . In recent years the number of participants ( including leaders ) has remained stable around 60-75
solar eclipse of that summer
Solar eclipse of August 11, 1999
International Astronomical Youth Camp