The diameter of our disk-shaped galaxy, the Milky Way, is about 1.0×105light-years. The distance to the Andromeda galaxy, which is the spiral galaxynearest to the Milky Way, is about 2.5 million light-years. If a scale modelrepresents the Milky Way and Andromeda galaxies as dinner plates 20 cm indiameter, determine the distance between the centers of the two plates.
The diameter of our disk-shaped galaxy, the Milky Way, is about 1.0×105light-years. The distance to the Andromeda galaxy, which is the spiral galaxynearest to the Milky Way, is about 2.5 million light-years. If a scale modelrepresents the Milky Way and Andromeda galaxies as dinner plates 20 cm indiameter, determine the distance between the centers of the two plates.
Given data
The diameter of the disk-shaped milky way galaxy in light years is Dg_ly = 1 x 105 light-years
The distance between the Andromeda galaxy and the milky way galaxy in light years is DA_M_ly = 2.5 million light-years = 2.5 x 106 light-years
The diameter of the galaxy in the meter is Dg_m = 20 cm = 0.2 m
A light-year is a unit that is used to represent the distance of the astronomical object.
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