"A group of astronomers say they have managed to calculate the milky way's mass for the very first time."
"in the Past estimates have asserted that the Milky way has a mass of between 500 billion and 3 trillion solar masses. The uncertainty has then been in how dark matter and dark energy to be measured. None of it has been observed, but is believed to be the largest portion of the matter of the universe."
"Researchers have circumvented this by measuring how quickly the dense clusters of stars moving in orbit around the galaxy."
"– The more massive a galaxy is, the faster it moves its clusters in its gravitational pull, " says Wyn Evans at the uk's Cambridge university."