"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spiral galaxy's central bar moves as a unit (which I heard about in 1960 -- I mean, from a book written in 1960) is outdated?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? ^_^
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*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spiral galaxy's central bar moves as a unit (which I heard about in 1960 -- I mean, from a book written in 1960) is outdated?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