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B1 متوسط انگلیسی 21:37 Educational

How Earth Moves

Vsauce · 31,496,351 بازدید · اضافه شده 4 روز پیش

آمار یادگیری

B1

سطح CEFR

5/10

سختی

زیرنویس‌ها (433 بخش‌ها)

00:02

[Music]

00:09

hey esauce Michael here do you have a

00:12

best friend who is there for you 247

00:17

365 sorry that's not really good enough

00:21

if your friend truly had your back they

00:23

would be there for you

00:28

24.6 7

00:35

891 also George Washington was born on

00:40

February 22nd

00:43

1732 at least that's what we're told

00:48

however his family Bible says he was

00:50

born on February 11th

00:53

1731 slash two so which is it Mr I

00:59

cannot tell a lie

01:01

oh and don't even ask about

01:04

1752 in Russia 1752 looked pretty normal

01:08

but check out what the British Empire

01:10

was up to that year nothing really out

01:13

of the ordinary except Ember the second

01:19

was followed by the 14th were 11 days

01:22

just

01:24

deleted where' they go what happened

01:28

then it is time

01:30

to

01:31

question time and how the Earth moves

01:36

reconciling both of these things has led

01:39

to some pretty strange

01:42

things we all love time-lapse videos of

01:45

the Stars moving across the sky but

01:48

really we are the ones who are moving

01:52

tumbling Through the Universe on a giant

01:54

wet Rock vehicle called Earth with a

01:57

windshield called the sky as viewed from

02:00

above the North Pole we spin

02:03

counterclockwise West chases East I

02:06

always remember this by thinking of the

02:08

us as a weird main headed animal with

02:11

Texas and Florida legs running forward

02:14

but we don't just spin we also revolve

02:18

around the sun on a plane tilted

02:22

23.4 de relative to our spin it's kind

02:27

of nauseating at this scale but from

02:31

this perspective you can see that the

02:32

sun rising and setting is just the Earth

02:35

pointing you towards and then away from

02:38

the Sun this motion causes your Sunrise

02:42

your noon the moment when the sun is

02:44

highest in your sky before your Sunset

02:48

to more closely investigate this

02:50

movement let's talk about

02:53

meridians you are on one at this very

02:56

moment your Meridian is just align from

02:59

where where you are right now straight

03:01

towards the North and South Poles it's a

03:04

line of longitude as opposed to the

03:07

horizontal lines that lay flat when

03:09

North or South is up that we call

03:12

flatitude

03:13

or actually latitude the sun is highest

03:18

in the sky to you your noon when your

03:21

Meridian is pointed right at the Sun a

03:23

cool thing happens at this moment all

03:25

Shadows around you point directly

03:28

towards one of Earth's poles

03:31

unless you're on the subsolar point the

03:36

subsolar point is the point on Earth's

03:38

surface directly below the Sun It's

03:41

Always Somewhere you can check its

03:43

current location online links as always

03:45

in the description on The subsolar Point

03:49

Shadows Fall straight down so they can

03:53

easily disappear twice a year the

03:56

subsolar point crosses over Hawaii the

03:59

only place in in the US where it hits

04:00

land and when it does it is called

04:03

lahina noon meaning cruel Sun straight

04:08

vertical objects look unnatural during

04:10

this brief time like they don't belong

04:12

as if they were photoshopped in without

04:15

regard for reality in Honolulu a

04:18

sculpture by isamu naguchi called

04:20

skygate casts a twisted Shadow all day

04:23

every day except during lahina noon when

04:27

its shadow is a perfect

04:30

Circle you may not live in a place where

04:33

the sun ever appears directly overhead

04:36

but once every earth rotation the

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