ASTRONOMY- Weeks 1-3 (final review- methods of viewing, ancient astronomers, light waves)
Physics And Astronomy 117 with Korenick at University of Wisconsin - River Falls
About this deck
By: Kelsey Jaeb
Created: 2011-05-03
Size: 52 flashcards
Views: 83
Created: 2011-05-03
Size: 52 flashcards
Views: 83
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Naked-eye
using only your eye to view something in the sky
on a circular star map, the center is the...
overhead point
on a circular star map, the rim is the
horizon
celestial equator
imaginary line over Earths equator
ecliptic
imaginary line- the apparent path of sun, planets
celestial north pole
the point over Earth's north pole.
-near Polaris or the North Star
-near Polaris or the North Star
what constellation are Alcor & Mizar in...
Big Dipp
resolution
the abillity to seperate 2 points of light as 2 points
refractor
light is collected and focused by a lens (bending the light due to slowing down)
spotter
wider field of view
reflector
objective is a mirror
objective
collects and focuses light
the 40inch diameter objective telescope is located....
Yerkes Observatory
-Williams Bay, WI
-Williams Bay, WI
the biggest reflector telescope (Cassegraine) is located....
Hawaii
the most famous telescope is the...
Hubble Space Telescope
the Geocentric Model is...
the assumption that the Earth was stationary at center
solar day
sun "rise" to sun "rise"
24 HOURS
24 HOURS
sidéreal day
star "rise" to star "rise"
23 HOURS 56 MINUTES
23 HOURS 56 MINUTES
month
moon phase to moon phase
sidéreal year
constellation in exact place at exact time
20 mins LONGER than solar year
20 mins LONGER than solar year
Solar year
sun in exact place at exact time
are stars stationary
NO.
retrograde motion
planets moving in the direction opposite to the movement of something else
Aristotle deduced that...
the earth is round
Aristotle believed in the ______ model
Geocentric
Aristotle thought that the planets were perfect _____
spheres/circles
Aristarchus of Samos said that Earth is...
NOT at center
-believed in the Heliocentric Model
-believed in the Heliocentric Model
What did Hipparchus do?
*developed a system for ranking stars by brightness (magnitude)
-smaller the number, brighter the star.
*discovered the 26,000 year cycle of stationary point.
*created 1st star catalog
-smaller the number, brighter the star.
*discovered the 26,000 year cycle of stationary point.
*created 1st star catalog
Copernicus deduced the...
*correct order of the planets.
*the time it took each planet to orbit the sun.
*the time it took each planet to orbit the sun.
Galileo Galélei discovered the Earth is not at the center because he discovered that...
*the Milky Way is composed of stars
*moons around Jupiter
*moons around Jupiter
Galileo Galélei discovered that planets were not perfect spheres because he discovered...
*mountains on the moon
*Saturn shows "bulges"
*sunspots
*Saturn shows "bulges"
*sunspots
describe Tycho Brahe and his accomplishments.
*used no telescope- VERY accurate
*recorded positions of the sun, moon, and planets for 20 years.
*astronomer with the golden nose.
*hired Johannes Kepler as his assistant.
*recorded positions of the sun, moon, and planets for 20 years.
*astronomer with the golden nose.
*hired Johannes Kepler as his assistant.
Johannes Kepler discovered the...
Three Laws of Planetary Motion
what are the Three Laws of Planetary Motion
1. Planets move in elliptical orbits
- with sun at one focus.
2. Law of Equal Areas.
- planet sweeps out of equal areas in equal times
3. (time to revolve around the sun in YEARS)2 = (average distance from the sun in ALL)3
- with sun at one focus.
2. Law of Equal Areas.
- planet sweeps out of equal areas in equal times
3. (time to revolve around the sun in YEARS)2 = (average distance from the sun in ALL)3
Isaac Newton discovered the...
Universal Law of Gravitation.
- motion needs force.
- gravity is a non contact force.
- motion needs force.
- gravity is a non contact force.
what is the Universal Law of Gravitation?
F↑ as Mass↑ = direct relationship
F↓ as Dist. ↑ = inverse relationship (not gravity)
F↓ as Dist.2↑ = inverse squared relationship
F↓ as Dist. ↑ = inverse relationship (not gravity)
F↓ as Dist.2↑ = inverse squared relationship
what are the 4 characteristics of a wave?
1. Wavelength
2. Amplitude
3. Frequency
4. Speed
(distance/time)
2. Amplitude
3. Frequency
4. Speed
(distance/time)
light travels through a...
"vacuum"
WAVELENGTH is the...
distance between identical points
λ LAMBDA
λ LAMBDA
WAVELENGTH determines the _____ of a wave.
color
AMPLITUDE is the....
height of a wave.
the symbol for it is A
the symbol for it is A
AMPLITUDE determines the ______ of a wave.
brightness
FREQUENCY is the...
number of waves passing through a point in a given time.
the symbol for it is μ
the symbol for it is μ
FREQUENCY determines the _____ in a wave.
energy
WAVELENGTH is measured in...
nanometers.
what is TRANSMISSION
light passing through a material
a window. (slows down going through window, then speeds back up)
a window. (slows down going through window, then speeds back up)
DIFFRACTION is....
bending of light due to edges.
DISPERSION is...
separation of wavelengths from a mixture.
(going through a prism at different speeds, prism effect)
(going through a prism at different speeds, prism effect)
SCATTERING is....
redirection of light by particles
(light goes everywhere, MANY beams of light)
(light goes everywhere, MANY beams of light)
SPEED OF LIGHT is....
the speed at which light travels
every element has a unique spacing of energy levels.
basically.... astronomers use it to find out the temperature of a star.
About this deck
By: Kelsey Jaeb
Created: 2011-05-03
Size: 52 flashcards
Views: 83
Created: 2011-05-03
Size: 52 flashcards
Views: 83
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have been getting MUCH better grades on all my tests for school. Flash cards, notes, and quizzes are great on here. Thanks!”
Kathy
Kathy