Sometimes it’s amazing how much settled science, even something as longstanding as the size of our galaxy, can get called into question: The Milky Way May be 50 Percent Bigger Than Thought : Discovery News.
A ring-like filament of stars wrapping around the Milky Way may actually belong to the galaxy itself, rippling above and below the relatively flat galactic plane. If so, that would expand the size of the known galaxy by 50 percent and raise intriguing questions about what caused the waves of stars.
…Evidence that the so-called Monoceros Ring, located more than 65,000 light-years from the center of the galaxy, actually is part of the Milky Way surprised Newberg, who was on a team that discovered the ring in 2002.
I have to admit that I hadn’t really heard of the Monoceros Ring, or if I had, it hadn’t stuck in my consciousness. Reading about…
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