Jorden er den tredje planet fra solen og det eneste objekt i universet, der vides at havne i livet. Ifølge radiometrisk dating og andre kilder til bevismateriale dannede jorden mere end 4,5 milliarder år siden. [24] [25] [26] Jordens tyngdekraft interagerer med andre objekter i rummet, især Solen og Månen, Jordens eneste naturlige satellit. Jorden drejer sig om Solen om 365,26 dage, en periode kendt som et jordår. I løbet af denne tid roterer jorden omkring sin akse omkring 366,26 gange. [N 5]
NASA GOES-13 Fuld Disk visning af Jorden 17 december 2010
NASA GOES-13 satellitbillede viser jord den 17. december 2010.
Kredit: NOAA / NASA GOES Project
NASA Goddard Space Flight Center er hjemsted for landets største organisation af kombinerede forskere, ingeniører og teknologer, der bygger rumfartøjer, instrumenter og ny teknologi til at studere jorden, solen, vores solsystem og universet.
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