"A free encyclopedia which explains everything in an easy way."
You could say that Visible Astronomy is an encyclopedia on astronomy, as it covers, in general terms, all you need to know about this science. Everything is explained in a fun, easy and accessible manner, so it can be understood by both children and adults.
The main topics covered in Visible Astronomy are the following: maps of the nearest stars, constellations, the daily rotation of the Earth, the rotation of the stars and their motion, the different orbits of the planets of the Solar System, the translational motion, the motion of the Sun, eclipses, the Zodiac, phases of the Moon, Earthshine, satellites of each planet, the history of astronomy (Ptolemy, Copernicus, etc), progress through history, etc.
Visible Astronomy is totally free.