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*’earth’s rotation’ is the rotation of the ‘planet earth’ around its own ‘axis’*
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(the ‘earth’ rotates from the ‘west’ towards ‘east’)
(as viewed from ‘north star’ (or pole-star ‘polaris’), the ‘earth’ turns ‘counter-clockwise’)
(the ‘north pole’ (also known as the ‘geographic north pole’ or ‘terrestrial north pole’, is the point in the ‘northern hemisphere’ where the earth’s ‘axis of rotation’ meets its ‘surface’)
(this point is distinct from the earth’s ‘north magnetic pole’)
(the ‘south pole’ is the other point where the earth’s ‘axis of rotation’ intersects its ‘surface’ (in ‘antarctica’))
(the ‘earth’ rotates once in about 24 hours with respect to the ‘sun’ and once every (’23 hours’ / ’56 minutes’ / ‘4 seconds’) with respect to the ‘stars’)
(earth’s rotation is ‘slowing slightly’ with ‘time’; thus, a ‘day’ was ‘shorter’ in the ‘past’)
(so ‘days’ are getting ‘longer’ over ‘time’)
(this is due to the tidal effects ‘the moon’ has on earth’s rotation)
(‘atomic clocks’ show that a ‘modern day’ is longer by about ‘1.7 milliseconds’ than a ‘century’ ago, slowly increasing the rate at which ‘UTC’ is adjusted by ‘leap seconds’)
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“day”
“stellar day”
(amount of time it takes the earth to rotate around its axis)
(a stellar day is not the same length throughout the orbital year)
(the earth stellar day averages 23 hours 56 minutes 4.1 seconds)
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“hour”
(60 minutes)
from proto-indo-european word *i̯ēro- (“year, summer”)
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“minute”
(60 seconds)
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“second”
the ‘second’ division of the hour by 60
(the ‘first’ division being the minute)
(the duration of 9192631770 periods of the ‘radiation’ corresponding to the transition between the 2 ‘hyper-fine levels’ of the ‘ground state’ of the ‘caesium 133 atom’)
(keep breaking it down)
(“millisecond” = 1/1000 of a second)
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*👨🔬🕵️♀️🙇♀️*SKETCHES*🙇♂️👩🔬🕵️♂️*
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💕💝💖💓🖤💙🖤💙🖤💙🖤❤️💚💛🧡❣️💞💔💘❣️🧡💛💚❤️🖤💜🖤💙🖤💙🖤💗💖💝💘
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*🌈✨ *TABLE OF CONTENTS* ✨🌷*
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🔥🔥🔥🔥🔥🔥*we won the war* 🔥🔥🔥🔥🔥🔥