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Ljósár Tengt efni | Tenglar | LeiðsagnarvalHversu langt er eitt ljósár? Hversu hratt þyrfti maður að ferðast til að ná þangað á einu ári?Stjörnufræðivefurinn: Ljósárbæta við greinina

Multi tool use
Multi tool use

StjörnufræðiStjarnfræðilegar mælieiningarLengdareiningar


lengdareiningstjarnfræðieiningstjörnufræðiheimsfræðiljósáritómarúmikílómetrarstjarnfræðieiningar












Ljósár




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Ljósár er lengdareining (stjarnfræðieining) sem notuð er í stjörnufræði og heimsfræði. Það er sú fjarlægð sem ljós fer á einu ári í tómarúmi, þ.e. 9,461 × 1012kílómetrar eða 63.240 stjarnfræðieiningar.



Tengt efni |


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Tenglar |



  • Vísindavefurinn: „Hversu langt er eitt ljósár? Hversu hratt þyrfti maður að ferðast til að ná þangað á einu ári?“

  • Stjörnufræðivefurinn: Ljósár


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