Study may give new respect to our Milky Way neighbourhood
Our corner of the Milky Way galaxy may be a bigger deal than scientists thought. The galaxy is shaped like a disk, with four major arms of stars, dust and gas spiraling out from the center. Our solar system lies at the edge of what's called the Local Arm, which resembles a separate piece of an arm.
Researchers calculated that it stretches more than 20,000 light-years long, maybe about four times what scientists had thought before, he said. That's still a lot shorter than the major arms.
The work was done by analyzing radio-wave emissions with the Very Long Baseline Array, a series of Earth-based dishes. Results were released Wednesday by the journal Science Advances.
The study, which also investigates other aspects of the Local Arm, "provides important contributions to the better understanding of our galaxy," said Denilso Camargo of Federal University of Rio Grande do Sul in Porto Alegre, Brazil. He didn't participate in the new work.
Author: Malcolm Ritter | Source: The Associated Press [September 28, 2016]