Which two massive spiral galaxies dominate the collection known as the Local Group?
Answer
The Milky Way and the Andromeda Galaxy
The Local Group is characterized as a small collection containing approximately fifty galaxies that are gravitationally bound together. Within this relatively small grouping, two specific galaxies stand out due to their immense size and mass: our home galaxy, the Milky Way, and its closest major neighbor, the Andromeda Galaxy. These two spiral giants serve as the dominant gravitational anchors for the entire Local Group, dictating the movements of the smaller satellite galaxies orbiting them. They are separated by a vast distance of roughly 2.5 million light-years.
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