path of the sun project: capri, amy, courtney? where ... · what type of eclipse would be seen by...
TRANSCRIPT
![Page 1: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/1.jpg)
Path of the Sun project: Capri, Amy, Courtney?
Where someone says, or you read, that “the sun is overhead at midday” is this strictly correct?
![Page 2: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/2.jpg)
Review: Eclipses
What type of eclipse would be seen by observers on the night side of the earth in this diagram?
A) Total solar eclipse B) Total lunar eclipse C) No eclipse D) Partial lunar eclipse
And what is wrong with the way this picture is drawn?
![Page 3: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/3.jpg)
Moon Phases: putting it all together
Another demo, with everyone out of your seat! Time for “moon balls” demonstration
![Page 4: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/4.jpg)
![Page 5: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/5.jpg)
If tonight the moon is full when it rises in the east, what phase will it be when it sets in the west?
A) Full B) last quarter C) New moon D) First quarter
Lecture tutorial, p.81, Cause of moon phase
![Page 6: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/6.jpg)
Now, back to motions of the Planets: Copernicus and Circles
Copernican theory: planets revolve around the sun, not around the earth
![Page 7: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/7.jpg)
Let’s watch what you might observe for Venus, Mars
http://astro.unl.edu/naap/ssm/animations/configurationsSimulator.html
This was before the telescope, so no ideas about what planets actually looked like – just points, like stars
![Page 8: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/8.jpg)
Lecture-tutorial, p. 99, Observing Retrograde motion
![Page 9: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/9.jpg)
Digress: what is a theory? The word "theory" means something very different in everyday language than it does in science: to the average person, a theory is just an idea… A scientific theory is an explanation of something that has been demonstrated through repeated experiments or testing. A scientific theory can also make predictions that can be tested What can we predict about the appearance of Venus when seen through a telescope?
![Page 10: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/10.jpg)
Galileo was the first to look at planets through a telescope. These are views of Venus at different points in its orbit:
![Page 11: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/11.jpg)
And again…
![Page 12: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/12.jpg)
Kepler: planets move in almost circular orbits
Kepler lived at the same time as Galileo, both born shortly after Copernicus published his book. He used the careful observations made by Tycho Brahe to modify Copernicus’ idea of circular motion.
He realized, from the orbit of Mars, that the planets move not on circular, but in elliptical orbits.
You will also have a chance to explore these in a computer lab. The web page looks like this:
![Page 13: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/13.jpg)
http://astro.unl.edu/naap/pos/animations/kepler.html
Simulator, Worksheet for Kepler’s Laws
![Page 14: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/14.jpg)
Review…
1. Planets orbit sun in ellipse
2. Line connecting sun and planet sweeps out equal areas in equal
3. Period (“Year”) squared = semi-major axis cubed
Kepler : provided understanding of motions of planets, and thus, every other body in the universe in his three laws
Wdefine the astronomical unit (a.u.), as the distance from the sun to the earth
![Page 15: Path of the Sun project: Capri, Amy, Courtney? Where ... · What type of eclipse would be seen by observers on the night side of the earth in this diagram? A) Total solar eclipse](https://reader035.vdocuments.mx/reader035/viewer/2022081613/5fbef112249f6317204f8057/html5/thumbnails/15.jpg)
Next : Isaac Newton, explained Kepler’s laws Breakthroughs in mechanics, optics, gravity, mathematics (invented calculus)