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Why are the sun and moon the same size in the sky?
New Scientist ^
| 30 January 2009
| Marcus Chown
Posted on 01/31/2009 12:27:31 PM PST by Daffynition
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To: chuck_the_tv_out
Gen 1:14a
And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs
Ahhh c'mon now, that's 'old' thinking, we're in the New Age of 0bama, didn't you have your epiphany and vote for B'rack?
Good thing Alcee Hastings is introducing legislation for FEMA camps in case of an 'emergency' because you sound like a real troublemaker, you need to be reeducated! ;)
21
posted on
01/31/2009 12:51:55 PM PST
by
mkjessup
(You are either with the Constitution, or you are with the TKU, "The Kenyan Usurper", CHOOSE dammit!)
To: Daffynition
The article doesn’t answer the question “Why are the sun and moon the same size in the sky?”
Why don’t they just say that they don’t know!
To: Daffynition
To: Daffynition
24
posted on
01/31/2009 1:04:37 PM PST
by
JoeProBono
(A closed mouth gathers no feet)
To: mkjessup
It has to be celestial affirmative action. The sun is forced to locate itself further from the Earth so that it will appear the same size, thus preventing the moon from developing an inferiority complex.
25
posted on
01/31/2009 1:07:11 PM PST
by
CrazyIvan
(If you read only one book this year, read "Stolen Valor".)
To: Leftism is Mentally Deranged
"The sun is about 400 times as wide as the moon, but it is also 400 times further away. The two therefore look the same size in the sky.."
I can do that math in my head ..... and I'm blond. ;)
26
posted on
01/31/2009 2:18:36 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: CrazyIvan
To: JoeProBono
28
posted on
01/31/2009 2:27:48 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: Yardstick
LOL
I wonder how many people even know what a clacker is?
29
posted on
01/31/2009 2:28:49 PM PST
by
mamelukesabre
(Give me Liberty or give me something to aim at)
To: Daffynition
Why do you drive on a parkway, but park on a driveway?
30
posted on
01/31/2009 2:29:19 PM PST
by
The Electrician
("Government is the only enterprise in the world which expands in size when its failures increase.")
To: mikrofon
hey!
What’s the big Idea posting that without warning people to NOT LOOK DIRECTLY AT THE ECLIPSE!
31
posted on
01/31/2009 2:30:59 PM PST
by
mamelukesabre
(Give me Liberty or give me something to aim at)
To: beaversmom
It’s an excellent video, I think I first saw it on phys.org and the background music is great. Thanks for the reminder.
32
posted on
01/31/2009 2:31:39 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: The Electrician
We will understand this when we figure out why Frosted Flakes have frosting, but pitted prunes DON’T have pits... and liberals aren’t about liberty.
33
posted on
01/31/2009 2:35:24 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: Daffynition
a striking coincidence"That's too coincidental to be a coincidence." - Yogi Berra
34
posted on
01/31/2009 2:37:49 PM PST
by
EternalVigilance
(Neanderthals for Life and Liberty - ) (AIPNEWS.com)
To: Daffynition
Sooooo....what's your perspective on
35
posted on
01/31/2009 2:54:06 PM PST
by
JoeProBono
(A closed mouth gathers no feet)
To: EternalVigilance
It's math:
It is one of the most interesting coincidence in the solar system that enables full Solar Eclipse.
The ratio of distance between the Sun and Earth, & Moon and Earth is almost exactly proportionate to the ratio of size of Sun to Moon.
In astronomy the sizes of objects in the sky are often given in terms of their angular diameter as seen from Earth, rather than their actual sizes.
The angular diameter of Earth's orbit around the Sun, from a distance of one parsec, is 2" (two arcseconds).
The angular diameter of the Sun, from a distance of one light-year, is 0.03", and that of the Earth 0.0003". The angular diameter 0.03" of the Sun given above is approximately the same as that of a person at a distance of the diameter of the Earth
This table shows the angular sizes of noteworthy celestial bodies as seen from the Earth:
Sun : 31.6' 32.7'
Moon : 29.3′ 34.1'
Venus : 10″ 66″
Jupiter : 30″ 49″
Saturn : 15″ 20″
Mars : 4″ 25″
Mercury : 5″ 13″
Uranus : 3″ 4″
Neptune : 2″
Ceres : 0.8″
Pluto : 0.1″
Eris : 40 mas
As can be seen the angular diameter of the Sun is about the same as that of the Moon (the diameter is 400 times as large and the distance also; the Sun is 200,000-500,000 times as bright as the full Moon (figures vary), corresponding to an angular diameter ratio of 450-700, so a celestial body with a diameter of 2.5-4" and the same brightness per unit solid angle would have the same brightness as the full Moon).
The angular diameter of an object as seen from a given position is the "visual diameter" of the object measured as an angle. In the vision sciences it is called the visual angle. The visual diameter is the diameter of the perspective projection of the object on a plane through its centre that is perpendicular to the viewing direction. Because of foreshortening, it may be quite different from the actual physical diameter for an object that is seen under an angle. For a disk-shaped object at a large distance, the visual and actual diameters are the same.
36
posted on
01/31/2009 3:34:21 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: Daffynition
37
posted on
01/31/2009 3:35:51 PM PST
by
Canedawg
(Lincoln freed the slaves, BO will free the terrorists. "Unity of purpose" my a- -, Mr.POS)
To: JoeProBono
38
posted on
01/31/2009 3:37:12 PM PST
by
Daffynition
("Beauty is in the sty of the beholder." ~ Joe 6-pack)
To: Daffynition
I witnessed a total solar eclipse in 1979 here on our North American continent. About 2 to 3 minutes in totality. One of the most amazing experiences in my life. It was worth the trip.
39
posted on
01/31/2009 3:39:55 PM PST
by
xp38
To: Daffynition
“The heavens declare the glory of God.”
40
posted on
01/31/2009 3:43:38 PM PST
by
EternalVigilance
(Neanderthals for Life and Liberty - ) (AIPNEWS.com)
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