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| North star. Does not move from its spot in the sky. |
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| Stars that do not set or rise. They sort of make a circle around the sky. |
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| Used for rough directions in the "map of the sky". |
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| Globe layout of the stars. |
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| As compared to longitude, east to west. |
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| Latitude, north to south. |
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| How high up, after knowing azimuth. |
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| Direction to look from north. |
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| Line the sun makes through stars or around the celestial sphere. |
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| The set of constellations the sun, planets, and moons move through. |
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| Equal day and night. There is a vernal and autumnal. |
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| The sun stops and the tilt of the earth is as far towards the sun as it can be. |
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| The sun is in the top of the sky. Your hemisphere is facing the sun. |
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| The sun is in the bottom of the sky. Your hemisphere is tilted away from the sun. |
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Term
| How long does is take the moon to go around the earth? |
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| Moon blocks sunlight from the earth. Shadow of the moon on earth. New moon. |
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| Earth blocks the sun from the moon. The moon is in earth's shadow. Full moon. |
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| Why is there not always an eclipse? |
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Definition
| The moon's orbit is tilted so the shadow can completely miss earth. |
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| A little "backward motion" over three months. Due to the earth moving faster than the planet. |
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Term
| Where did the 60 based system originate from? |
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| Most associated with ancient greek worldview which dominated in the middle ages. |
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| Rejected the Geocentric model, supported the Heliocentric. |
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| When the people thought that the earth was the center of the solar system. |
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| The sun is at the center of the solar system. |
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| Accurately determined Earth's size. |
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| Greek astronomy which wrote the almagest. The almagest is a book. |
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| Created heliocentric idea. |
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| Observational astronomer. Last astronomer without a telescope. Provided Kepler with his information. Very good measurements, very precise. |
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| First to use a telescope. Challenged the geocentric model through the phases of venus and the moons of jupiter. Challenged heavenly perfection with sunspots and the mountains on the moon. |
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| 1st Law of Planetary Motion: Law of Ellipses |
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Definition
| The orbit of a planet is an ellipse where one focus of the ellipse is the sun. |
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| 2nd Law of Planetary Motion: Law of Equal Areas |
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Definition
| A line from the planet to the sun sweeps at equal areas in equal amounts of time. (One planet) |
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| 3rd Law of Planetary Motion |
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Definition
| Larger the orbit of a planet, the longer it's period of orbit. (Two planets) |
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Term
| Newtons First Law of Motion |
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Definition
| Law of inertia, a body remains at rest or moves in a straight line unless acted upon by a net outside force. |
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Term
| Newton's Second Law of Motion |
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Definition
| Law of motion, the acceleration of an object is proportional to the force acting upon it. F=ma |
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| Newton's Third Law of Motion |
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Definition
Law of reciprocal actions, for every action there is an equal and opposite reaction.
Law of universal gravitation: F=Gm1m2/r2 |
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Definition
| Short wave lengths, ultraviolet, blues, all HOT HOT HOT. Red... not so hot. |
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Definition
| Brighter equals shorter wave length and hotter. |
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| Perfect emitter and absorber of radiation. |
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| Coldest possible temperature. |
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| Degrees above absolute zero. |
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| Continuous, absorption, emission light. |
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| A few missing. Dark line or this spectrum is viewed behind a cool gas under pressure. |
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| All present. Hot solid, liquid or gas, under high pressure gives this off. |
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| Only have certain lines. Hot gas under low pressure produces a bright-line or this spectrum. |
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Term
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Definition
Observer effect, how it is moving compared to you.
Toward: Blue shifted.
Away: Red shifted.
Faster shift, faster moving.
Transverse (sideways) doesn't apply.
Radial (toward/away). |
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| Not an eclipse every month because... |
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