Start to the Day of Astronomy (Astronomy Day) was given in 1973 in California. The president of the Astronomical Association of Northern California J. Berger (Doug Berger) has decided that it is not necessary to agitate people to travel great distances to visit open houses the famous observatories, but instead need to install the available telescopes in crowded places — on the streets, in shopping malls, parks.
thus brought together all these amateur astronomers, and the motto of the new astronomical movements were the words: "Supporting people to astronomy" (Bringing Astronomy to the People).
Astronomy Day is sponsored by 14 organizations, among which the most influential are the Astronomical League, the Pacific Astronomical Society, the Royal Astronomical Society of Canada, the International Union Planetarium, American Astronomical Society.
In 2007, the Astronomical League began to popularize the Spring and Autumn Days of Astronomy, to determine which of them will attract more attention of the public and interested organizations.
Spring Astronomy Day is usually celebrated on Saturday — in the period from mid-April to mid-May, or near the front of the 1st quarter of the moon. Fall Astronomy Day is celebrated in the period from mid-September to mid-October. Week from Monday to Sunday, including the Day of astronomy is called Week of Astronomy (Astronomy Week).
On the Day of thousands of astronomical astronomy clubs, science museums, observatories , planetariums in many countries spend a lot of interesting events (Photo: Henryk Sadura, Shutterstock)
In Week of Astronomy and especially in the very day thousands of astronomical astronomy clubs, science museums, observatories, planetariums in many countries spend a lot of exciting activities, including public lectures of famous astronauts, newsgroups, joint projects, mass demonstrations of the sky. The schools hold special classes on the basics of astronomy, and at trade shows can taste space food.
By the way, the International Astronomical Union declared 2009 the International Year of Astronomy (IYA2009). This decision was supported by UNESCO and endorsed by the General Assembly of the United Nations.