Supermassive Black Holes Not So Big After All
An anonymous reader writes "Supermassive black holes are between 2 and 10 times less massive than previously thought, according to new calculations published by German astrophysicists (abstract)."
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The translation from "two times less massive" to "less massive by a factor of two" is pretty straightforward and easily understood...
The real problem happens in the opposite direction. A star that's 200% as massive as the sun is smaller than one that's 150% more massive than the sun, but many people will give the wrong answer if asked.