pedanther

"the idea that a galaxy's spiral arms aren't rigid collections of stars, but standing waves that individual stars move into and out of over time"

*reads Wiki* So, wait, the concept that a barred spiral galaxy's central bar moves as a unit (which I heard about in 1960 -- I mean, from a book written in 1960) is outdated? And the replacement IS EVEN COOLER? ^_^

SCIIIIIIIIENCE. :D