UNIT 3 SOCIAL STUDIES - THE SOLAR SYSTEM-
PART 1 THE EARTH -EARTH´S ROTATION AND REVOLUTION-
PART 2 THE MOON AND PHASES OF THE MOON
PART 3 THE SOLAR SYSTEM
3.1. PLANETS
3.2 SATELLITES
3.3 COMETS
3.4 ASTEROIDS
3.5 STARS
3.6. CONSTELLATIONS
3.6. NEBULAE
3.7 GALAXIES
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