给高一学生讲解太阳周日视运动规律。---**Image Content Extraction:** **Caption:** 图 1.15 北纬 40° 地区二分二至日正午太阳高度和日出日落的大致时间 **Diagram Description:** * **Type:** Diagram illustrating the apparent path of the sun in the sky at different times of the year (Winter Solstice, Equinoxes, Summer Solstice) for a location at 40° North latitude. It shows the sun's altitude at noon and the approximate times of sunrise and sunset. * **Main Elements:** * A large blue semi-circle represents the celestial dome above the horizon. * A green curved plane represents the horizon, with directions labeled: 南 (South), 北 (North), 东 (East), 西 (West). * Three large orange circles represent the sun's position at noon on the Winter Solstice (冬至), Spring Equinox/Autumnal Equinox (春分、秋分), and Summer Solstice (夏至). * The altitudes of the sun at noon are indicated by dashed pink lines and angles relative to the horizon: * Winter Solstice (冬至): 26°34' * Spring Equinox/Autumnal Equinox (春分、秋分): 50° * Summer Solstice (夏至): 73°26' * Curved solid pink lines with arrows indicate the apparent path of the sun across the sky for the Winter Solstice, Equinoxes, and Summer Solstice. The arrows show the direction of movement (from East to West). * The label "日视太阳轨迹" (Apparent Sun Path) is shown along one of the paths. * Smaller orange semi-circles are shown on the horizon indicating sunrise/sunset positions and approximate times: * Sunrise: * East direction: 6:00 * North-east direction: 4:30 * South-east direction: 7:30 * Sunset: * West direction: 18:00 * North-west direction: 19:30 * South-west direction: 16:30 * An illustrative cityscape is depicted below the horizon plane.