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*as of ‘17 SEPTEMBER 2023’*
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*AKA* –>
“expanding 3 kpc arm“
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*ABBREVIATEON* –>
*3 kpc Arm*
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*the near 3 kpc arm was discovered in the ‘1950s’ by astronomer ‘van woerden’ + collaborators through 21-centimeter radio measurements of HI (‘atomic hydrogen’)*
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(it was found to be expanding away from the center of the ‘milky way’ at more than 50 km/s)
(this spiral arm contains about 10 million solar masses of gas, mostly hydrogen atoms and molecules)
(it is located in the fourth galactic quadrant at a distance of about 5.2 kpc from the sun and 3.3 kpc from the galactic center)
(the last attempt to search for star forming regions in the Near 3 kpc Arm (in 1980) showed little star formation occurring in the numerous molecular clouds of this arm)
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(along with the ‘far 3 kpc arm’ discovered in ‘2008’, these ‘inner arms’ establish our galaxy’s ‘simple symmetry’)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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👈👈👈☜*’SPIRAL ARMS’ OF THE ‘MILKY WAY’* ☞ 👉👉👉
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥