La Tierra: sistema solar, movimiento, representación y coordenadas

Apuntes

• Subtopic: The Earth in the Solar System How many planets form the solar system and what are they? There are eight: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. What position does Earth occupy with respect to the sun? It is the third planet closest to the Sun. What conditions make life possible? Temperature, atmosphere, and water. What is the biosphere? It is the zone of Earth where life develops. How many layers does the Earth's outer part have and what are they? Three: The atmosphere, a gaseous layer that surrounds Earth; the hydrosphere, the collection of waters on the planet; and the lithosphere, the solid outer layer of Earth. • Subtopic: A Planet in Motion What is the rotation movement? It is the movement Earth makes when it spins on its own axis. It takes 24 hours to complete one rotation. What is the translation movement? It is the movement Earth makes when it travels around the Sun, describing an elliptical orbit. It takes 365 days and almost 6 hours to complete one orbit. This is why leap years exist, as every four years a day is added (4x6) to compensate for this discrepancy. What is the solstice? It is the date marking the transition from autumn t...