*THE 4 ‘SPIRAL ARMS’ OF THE ‘MILKY WAY’*
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*’spiral arms’ are ‘regions’ of ‘stars’ that extend from the center of ‘spiral’ + ‘barred’ spiral galaxies*
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(these ‘long’/ ‘thin’ regions resemble a ‘spiral’ and thus give ‘spiral galaxies’ their name)
(naturally, different ‘classifications’ of ‘spiral galaxies’ have distinct ‘arm-structures’)
(‘Sc’ and ‘SBc’ galaxies, for instance, have very “loose” arms, whereas ‘Sa’ and ‘SBa’ galaxies have (‘tightly-wrapped’ arms) (with reference to the ‘hubble sequence’))
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(either way, ‘spiral arms’ contain many (‘young’ / ‘blue’ stars) (due to the “high ‘mass density'” and the “high rate of ‘star formation'”), which make the ‘arms’ so ‘bright’)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥