Conjunction of Jupiter and Venus, June 30, 2015 - Alpes-Maritimes
During the formation of the solar system, bodies are formed in orbit around the sun with such a mass that they acquire spherical shapes thanks to their gravitational force: they are the planets.
The term planets comes from the Greek planets (π λ α ν η τ η ς) meaning vagrants & nbsp; he thus described as wandering stars those celestial objects which, unlike stars, do not seem relatively motionless to the naked eye.
The International Astronomical Union has recently clarified the definition of a planet: a celestial body orbiting a star, with a sufficient mass to lead to a roughly spherical shape and to eliminate by attraction any other body moving on a near orbit.
The eight recognized planets of the solar system are as follows: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.
The first four (and therefore Venus) are telluric planets, which have a solid crust.
The next four (and therefore Jupiter) are gaseous planets, of which only the nucleus is solid.
