/
/
/
/
/100 %
/ 1421
/
/
-
-
-
-
-
-
-
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/
- 1430.
- 27- 29 1430 .
- 1428 .
- 1426 .
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-
- .
- .
- the physics teacher physics today sky and telescope solar energy physics today ( ) .
- .
- .
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/
- .
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- astronomy school .
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