4 ms·
the answer here has more background: http://astronomy.stackexchange.com/questions/10175/how-many-arms-does-the-milky-way-galaxy-have http://astronomy.stackexch
by ramgorur 10y ago
the answer here has more background:
http://astronomy.stackexchange.com/questions/10175/how-many-arms-does-the-milky-way-galaxy-have http://astronomy.stackexchange.com/questions/10175/how-many-...
- acqq 10y agoThanks! It also has some pictures, which more commenters expected to see.