The Cosmos

"A missionary of the Middle Ages tells that he had found the point where the sky and the Earth touch..." —Flammarion Engraving (Colorized)

The Cosmos is the name given to everything that is above the terrestrial atmoplane.

The Sun

The Sun Main Page

— Temperature Variations of sunlight

— Distance to the Sun

— The Seasons

— The Setting of the Sun

— Constant Speed of the Sun

— Magnification of the Sun at Sunset, or how the sun maintains its size throughout the day.

— The Equinox

The Moon

The Moon Main Page

— The Tides

— The Solar Eclipse

— The Lunar Eclipse

— The Phases of the Moon

— Moon Transparency

— A Close Look at the Lunar Lander

The Planets

The Planets Main Page

— Retrograde Motion of the Planets

The Stars

The Stars Main Page

— Problems of the Galaxies

General Physics

• Astrophysics