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2. venus
3. sistem dgn mthri sebagai pusat dikelilingi planet dn bnda langit lainya seperti komet, asteroid, meteor
4. orbit
5. benda lngit yg dpt memancarkan cahaya sndri
6. merkurius, venus, bumi, mars, jupiter, saturnus, uranus, neptunus
7. meteor
8. asteroid
9. venus
10. elips