Finally, there remains one last question: how will the universe end? We know now that it started very small and very hot and that it is today almost cold and…
Oberserving The Stars
To begin, I advise you to buy a small bezel 60 mm or 80 mm in diameter and 500 to 900 mm focal length. You can also use a spotting…
With the naked eye you can observe the stars and the constellations and it is also the only way to learn to recognize them by comparing what you see with…
The Sun Modifies The Climate
As you have understood according to the season, the Sun illuminates and warms more or less strong certain regions of the Earth. In summer, in Europe it is hot on…
Blue Sky and Red Sun
The blue color of the sky is explained by the diffusion of light by the air molecules contained in the atmosphere. Most colors, red, orange and yellow, go through the…
The Rainbow and The Halo
It was Newton, at the age of 23, who discovered in 1666 that the light of the sun was made up of a mixture of colors. By passing the light…
Fly to The Moon!
For thousands of years men believed that the Moon was so remote that it was inaccessible. When someone was told that she was in the moon, they meant that she…