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天体の見かけの動き
天球
南 北
西
東
方位
高度 観測者
天球と星の見え方
観測1 太陽の1日の動きを調べてみる
透明半球を使って、太陽の動きを記録に取
る。
10:00
11:00
9:00
影中心
9:0010:0011:00
透明半球のふち
まで伸ばした線
は、真横から見
ると直線になっ
ている。
球面分度器
9:00
10:00
11:00
8:00
13:00
15:00
16:00
14:00
12:00
南
東
北
西
中心
12:00
もっとも
い高 位置
に が太陽
あるとき
は、方位
とな真南
る。
Q1.透明半球を観測者から見た天球と考えると、
観測者の位置はどこになるか?
Q2.地平線にあたるのはどの位置か?
東
南
西
北
天頂
南中高度
日の出
日の入
り
昼間の太陽
の通り道
南中
天球
天の子午線
天球上の太陽の動き(秋分の日)
地平線
真南と天頂、真
北を結ぶ半円
天頂
天頂
天頂
赤道付近での太陽の動き 日本での太陽の動き
北極付近での太陽の動き
日周運動日周運動
地球の自転による1
日の太陽の見かけの
動き
地球の自転による1
日の太陽の見かけの
動き
地 軸地 軸
自 転自 転
星座の星の一日の動き
星座をつくる星は、時間とともにど
のように動いているだろうか。
南 北
東
西
南
東 西
南 北
西
東
北西
北極星 3
0 °
3
0 °
北 南東
東
南
西
北
天頂
天の北極
東
南
西
北
天頂
天球上の太陽の動き(秋分の日)
地平線
天の北極
北
極
南極
天球上の太陽の動き(秋分の日)
東
南
西
北
天
頂
地平線
天の北極 北
極
南極

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