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26 Cards in this Set
- Front
- Back
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Phases of the moon |
First quarter, full moon, third quarter and new moon |
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Full moon |
The earth is in between the moon and the sun, allowing full reflection |
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New moon |
The moon is between the earth and the sun, allowing no light to reflect to the earth |
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Lunar orbital tilt |
The 5 degrees of the moon above or below the orbit plane |
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Line of the nodes |
When the moon passes through the orbital plane |
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The orbital plane |
The imaginary line between the earth and the sun over the course of our 365 day revolution |
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Problems with the earth moon system |
The moon is getting further every year The moor stables our wobbling axis Tidal locking, we only see one face of the moon |
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Perfection of the heavens |
Non changing- no evolution Circles- everything travels in circles Uniform motion- cruise control |
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Imperfection of the heavens theorists |
Brahe- supernova observation Kepler- first and second laws/ ecliptic Galileo- lunar craters and sunspots |
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Support heliocentrism |
Seasons Parallax- stars change position Retrograde motion Galileo- Jupiter's moons follow it Galileo- phases of venues, proves it orbits the sun Kepler- first law of motion |
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Newtons first law |
An object in motion will stay in motion unless acted upon an out side force, same for a resting object |
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Newtons second law |
Force = mass×acceleration |
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Newtons third law |
Every action has an opposite and equal reaction |
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Keplers first law |
Planets orbit in ellipses not circles |
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Keplers second law |
Non-uniform speed; fast close to sun, slow far from sun |
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Keplers third law |
Period of or it is directly related to semi-major axis~ a^3/p^2=M |
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Spectrum |
A break down of light by wave length |
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Parts of an atom |
Nucleus; protons and nuetrons Electric cloud; electrons |
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Why are mirrors better than lenses |
Cost Chromatic aberration Weight Paneled mirrors Shape controlled mirrors Hole in the center of the mirror |
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Why do mirrors cost less? |
A lens must be perfect:free of impurities |
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Why is chromatic aberration a factor of how mirrors are better than lenses |
Lenses bend light by color so blue and red get separated |
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How is a mirror and lens weight differentiate |
The bigger the lens the fatter it is: heavier The mirror doesn't get wider so the weight doesn't increase as fast |
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Why are paneled mirrors more efficient |
All points of a mirror reflect the image Cost efficient: don't have to replace entire mirror if only one panel breaks |
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Why control the shape of a mirror with a computer |
You might not be able to replace a panel at the current time so the image does not loose focus |
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Why is there a hole in the center of a mirrored telescope |
Since all points on the surface reflect the same image a hole can be placed so the light can be directed to a primary mirror |
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Phases of Venus |
Small when full Large when new |
