Stars

People have been observing stars for ages. In the ancient times priests believed that stars had the mystical or religious significance. Astrology was frequently the only source of knowledge in the surrounding world and knowledge meant power. Stars had a huge impact on the development of our civilization. They helped people invent a calendar, navigation and understand numerous phenomena that occur in Earth and in the Universe.

What is a star?

A star is a spherical celestial object that forms a cluster of gravitationally bound matter. Stars are formed from the collapse of a molecular cloud and they mainly consist of hydrogen and helium. Stars differ from one another in their brightness and density and their sizes range from several dozen to thousands of diameters of the Sun. These extraordinary celestial objects have been inspiring artists, philosophers, poets and musicians for ages.