Which of the following best describes the Milky Way Galaxy?
a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars
a spiral galaxy with a disk about a billion kilometers in diameter and containing between 100 million and 1 billion stars
a spiral galaxy with a disk about 100,000 light-years in diameter and containing about 100,000 stars
a spherically shaped collection of stars including our solar system and about a dozen other solar systems, stretching about 4 light-years in diameter
a spiral galaxy with a disk about 100,000 light-years in diameter and containing between 100 billion and 1 trillion stars
Option A