IDK | RANDOM | poop | hi | idk |
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What is the Scientific Theory?
A model that explains a wide variety of observations in terms of a few general principles that has survived repeated and varied testing.
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What are equinoxes?
When the sun rises precisely due east and sets due west
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Expands the capabilities of telescopes.
Adaptive optics can overcome distorting the effects on Earth's atmosphere. interferometry allows us to link many telescopes so they act like large telescope *What are these all examples of?
Technology Revolutionizing Astronomy
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What is the summer solstice and winter solstice?
Summer solstice = the highest path, rest and set at most extreme north spots
Winter solstice = lowest path, rise & sets at south spots |
What is a lunar eclipse?
The moon moves through the shadow of the earth.
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What is a Corona?
outermost layer of solar atmosphere
1 million k |
When you are faced with a choice between two explanations that are equal, always choose the simpler explanation. What is this called?
Occam's Razor
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Why do stars rise and set?
Earth rotates west to east, so stars appear to circle from East to West
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Why do we see phases of the moon?
Lunar phases consequence of moon's 27-3 day orbit around earth
as moon orbits, we see more of the side that is lit by sun "grapfruit scale" - moon + 1.5 inches away from earth |
What causes eclipses?
Earth and moon cast shadows
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What seeks explanation from observed phenomena that relies solely on natural causes?
(scientific model can't include: divine intervention or metaphysics)
Scientific Hallmark #1
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What is the scientific progression through the creation and testing of models of nature that explain the observable universe as simply as possible.
*occams razor
Scientific Hallmark #3
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Why do the constellations we see depend on the latitude and time of year?
Your attitude determines which constellations are hidden by Earth
Time of year determines the location of the sun in the sky |
What is a solar eclipse?
The earth moves through the shadows of the moon.
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What is an analemma?
The shape of the path of the sun
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What is angular size?
-Angle that subtends at a given distance - not constant, decreases with distance
***angular size changes physical size does not |
How many constellations in the sky?
88 constellations / also called asterisms
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What is a model that must make testable predictions about natural phenomena that would force us to revise or abandon the model if the predictions don't agree with the observations?
Hallmark of Science #2
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Synchronous Rotation: moon rotates exactly once with each revolution around the earth
*earth and moon are tidally locked This explains why...?
Why we only see one side of the moon
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The tilt of Earth's axis - sun changes it's position through the year because of Earth's axis
THE REASON FOR THE SEASONS??
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What is an Ecliptic?
-Plane of solar system
-Happens since all of the planets in the solar system orbit the sun in a plane. |
How do telescopes help us learn about the future?
1. They have better light collecting area
2. Better angular resolution 3. Better wavelength coverage |
Why do we put telescopes into space?
1. Light pollution
2. Atmospheric Turbulence *causes twinkling and blurs image 3. Atmosphere absorbs most of EM spectrum - including all UV, all X-ray, and most infrared light. |
What is the Scientific Method?
make an observation -> ask a question -> suggest a hypothesis -> make a prediction -> perform a test: experiment or additional observation
*repeat if hypothesis is wrong |
How does the orientation of Earth's axis change with time?
The tilt remains about 23.5 degrees, but Earth has a 26,000 year precession cycle that slowly & subtly changes the orientation of the Earth's axis.
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