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science. In the diagram, letters A, B, C, and D represent Earth’s location on the first day of the four seasons as it orbits the Sun. Aphelion [Earth’s farthest distance from the Sun] and perihelion [Earth’s closest distance to the Sun] are labeled to show the approximate positions where they occur in Earth’s orbit.
Imagine a line passing through the center of Earth that goes through both the North Pole and the South Pole. This imaginary line is called an axis. Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth’s rotation.
Topic 4 Motions of Earth, Moon, and Sun. Overview: without streetlights to dim and hide the moon and planets, most cultures of the past made calculations that predicted their motions. The moon especially became a major tool for timekeeping.
The Earth's orbit around the Sun is an ellipse and travels at different speeds during the year - slowest at Aphelion (furthest point from the Sun) and fastest at Perihelion (closest point to the Sun)
The Earth moves through space in two ways: rotation and revolution. Earth orbits, or follows a path, around the sun, making one complete revolution every 365.24 days due to the sun’s gravitational pull. A revolution is the movement of one object around another object.
Standard 4 Key Idea 1. Performance Indicator 1.1. Explain complex phenomena, such as tides, variations in day length, solar insolation, apparent motion of the planets, and annual traverse of the constellations. Major Understanding:
Chapter 4: the Earth's Motion and the Seasons One cannot consider solar energy without becoming aware of the earth's motion, both its rotational motion about its own axis, and its orbital motion about the sun.
