During the year, the distance between Earth and the Sun is changing because the Earth, and other planets move in elliptical orbits. The mean distance between the Earth and the Sun, which is equivalent to approximately 150 million kilometres, called the astronomical unit. The aim is to understand what it is the solar system, enumerate the planets of the solar system, know how to use the online telescope for observing the planets of the solar system.
Take a look at lesson/education scenario Solar System, Earth for ideas to use in the classroom
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