The size of the sun

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MHar

The size of the sun
« on: November 19, 2006, 06:47:45 PM »
How can the size of the sun possibly be determined? what makes it 32 miles in diameter?

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Masterchef

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The size of the sun
« Reply #1 on: November 19, 2006, 06:55:17 PM »
They don't need evidence to back things up. They are Flat Earthers.

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skeptical scientist

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Re: The size of the sun
« Reply #2 on: November 19, 2006, 07:28:11 PM »
Quote from: "MHar"
How can the size of the sun possibly be determined? what makes it 32 miles in diameter?

By measuring the observed angle the sun makes above the horizon at different points of the earth, the distance between the earth and sun can be determined. From that and the apparent size of the sun in the sky, the actual size can be determined.
-David
E pur si muove!

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MHar

Re: The size of the sun
« Reply #3 on: November 19, 2006, 08:03:23 PM »
Quote from: "skeptical scientist"
Quote from: "MHar"
How can the size of the sun possibly be determined? what makes it 32 miles in diameter?

By measuring the observed angle the sun makes above the horizon at different points of the earth, the distance between the earth and sun can be determined. From that and the apparent size of the sun in the sky, the actual size can be determined.


how can we determine the distance between the earth and the sun?

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skeptical scientist

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Re: The size of the sun
« Reply #4 on: November 19, 2006, 08:12:04 PM »
Quote from: "MHar"
Quote from: "skeptical scientist"
By measuring the observed angle the sun makes above the horizon at different points of the earth, the distance between the earth and sun can be determined.


how can we determine the distance between the earth and the sun?

By measuring the observed angle the sun makes above the horizon at different points of the earth, we get a triangle with base and both base angles known. From there it's easy to use trig to calculate the height.
-David
E pur si muove!

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rr332211

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Re: The size of the sun
« Reply #5 on: November 19, 2006, 09:15:55 PM »
Quote from: "skeptical scientist"
Quote from: "MHar"
Quote from: "skeptical scientist"
By measuring the observed angle the sun makes above the horizon at different points of the earth, the distance between the earth and sun can be determined.


how can we determine the distance between the earth and the sun?

By measuring the observed angle the sun makes above the horizon at different points of the earth, we get a triangle with base and both base angles known. From there it's easy to use trig to calculate the height.
But I thought the Sun moved unpredictably in FE.

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Nomad

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The size of the sun
« Reply #6 on: November 19, 2006, 09:17:08 PM »
I don't recall hearing anything about that.
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rr332211

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The size of the sun
« Reply #7 on: November 19, 2006, 09:20:32 PM »
I don't recall hearing anything about a definite pattern of the Sun, and how that pattern is maintained.

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skeptical scientist

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Re: The size of the sun
« Reply #8 on: November 19, 2006, 09:43:54 PM »
Quote from: "rr332211"
But I thought the Sun moved unpredictably in FE.

No no no, this is entirely false. The sun moves in a circle approximately over the equator (i.e. the circle centered at the north pole with radius half that of the earth), but whose radius varies seasonally, so during the summer it circles over the tropic of cancer and in winter over the tropic of capricorn. The motion is entirely predictable, but even if it weren't, it would be irrelevent to the experiment I described, as the whole point is that you are taking measurements at the same time at two different locations.
-David
E pur si muove!

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Stapler117

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The size of the sun
« Reply #9 on: November 20, 2006, 02:09:28 AM »
Hmmm.... Pathological ignorance. It sounds like a solid explanation to me.