Milky Way is Square?

Researchers create a new map of our galaxy, with the following features:

One conclusion is that the Milky Way has an additional spiral arm, not seen in previous surveys of the galaxy. The new arm is about 30,000 light years from the galactic core at a longitude of between 80 and 140 degrees.

But a bigger surprise is their conclusion that some of the arms in the Milky Way are not curved in the traditional way, but are straight instead. This gives the Milky Way a distinctly squarish look.

Kudus: Technology Review.

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