Deep in the night sky, in the constellation of Sagittarius, shrouded by interstellar gas and dust, lies a mysterious object. So enigmatic is this object, it cannot be observed directly, not even light can escape its presence.

Deep in the night sky, in the constellation of Sagittarius, shrouded by interstellar gas and dust, lies a mysterious object. So enigmatic is this object, it cannot be observed directly, not even light can escape its presence.

Sometimes white, sometimes red, crescent-shaped, oval or perfectly round, the Moon has been the faithful companion of the Earth for billions of years.

In relation to the Sun, Venus is the second planet after Mercury, just in front of the Earth. It is the only planet that shines stronger than the Sirius star, with a magnitude that can exceed -4.5 when it is close to the Earth (lower opposition).

Mercury is a small planet that resembles the Moon with a diameter of 4878 km (against 12756 km for the Earth). Mercury does not have an atmosphere.

We speak of a system because there is not only one ring but countless, almost an infinity. The rings of Saturn are unique in the solar system because they are both very extended and very bright.

Saturn, the planet with the rings. It is really the most beautiful planet of the solar system. Located two times farther from the Sun than Jupiter, Saturn is also 10 times smaller than him or 4.5 times smaller if we take into account his rings.

Jupiter, Zeus, the god of Olympus, is 773 million km from the Sun, 5 times farther than the Earth and revolves around the Sun in just over 11 years. It turns very fast on itself: in 9h55 min against 24 hours for the Earth. Jupiter is the largest planet in the solar system.

Apart from our star, the Sun, and some small stars (comets, asteroids, etc.), the solar system includes 8 planets that can be divided into three categories. There are 4 terrestrial planets, that is to say having a rocky and therefore solid surface: Mercury, Venus, Earth and Mars, to which is added Pluto which is a dwarf planet.

Light is electromagnetic radiation within a certain portion of the electromagnetic spectrum. The word usually refers to visible light, which is the visible spectrum that is visible to the human eye and is responsible for the sense of sight.