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40 Cards in this Set
- Front
- Back
major contributions in different fields and not Philosophers |
The Greek |
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Great scientists and mathematicians |
The Greek |
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Golden Age of early astronomy was centered |
Greece |
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They made use of their ______________ to explain certain events |
observational data |
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They were the ones who measured the _______ and _______ of the sun and moon |
sizes and the distances |
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They used basic ________ |
geometry and trigonometry |
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Early Greeks viewed the earth as____ |
Geocentric view |
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Geocentrism |
earth centered |
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Heliocentrism |
Sun Centered |
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The celestial bodies_________ the Earth |
Orbited |
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traveled daily around the earth but all stayed transparent and hollow sphere beyond the planets called celestial sphere |
Stars |
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The shape of the Earth has a bulging equator and Squeezed poles |
Oblate Spheroid |
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happens two times in the year |
Solstice |
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two types of Solstice |
summer and winter solstice |
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reaches its highest or lowest point in the say at noon marked by the longest and shortest days |
sun |
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obscuring of the light from one celestial body |
Eclipse |
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Moon moves into the Earth's shadow, causing the Moon to be |
Lunar Eclipse |
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Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially |
Solar Eclipse |
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Earth and planet revolve the sun |
Heliocentrism |
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Earth is assumed to be at the center of it all |
Geocentrism |
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Greens Believed that the earth was round not flat |
500 BC |
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first to propose a spherical earth |
Pythagoras and his pupils |
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500 to 430 BC he supported Pythangoras proposal through his observations of shadows that cast on the moon during a lunar eclipse |
Anaxagoras |
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reflected on the moon's surface and shadow reflected was circularAristotle - 340 BC listed several |
Earth's shadow |
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340 BC listed several arguments for Spherical Earth including position of north star and disappearance of North star the ships believed to be at a fixed position in the sky |
Aristotle |
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In the________ they noticed that the north star is closer to the horizon |
Equator like Egypt |
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argued the shape of the sun and moon were both spherical perhaps the earth is too |
Aristotle |
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observers should become smaller and smaller until it disappeared the hull disappeared first before the sail |
Disappearing ships |
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Ancient scholars provided a proof of a spherical earth and its Circumference through calculation |
Size of the Spherical Earth |
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gave the most accurate size during their time |
Eratosthenes |
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Eratosthenes was working in |
Library of Alexandria in Northern Egypt |
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he received correspondence that no vertical object cast any shadow at noontime during summer Solstice |
Syene in South Egypt |
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"at noon time during the summer solstice vertical object still cast shadow " |
Alexandria |
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determined the angle of the sun |
Erasthothenes- |
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what did Erasthothenes use |
vertical Stick cast |
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in Alexandria Sun makes an angle of _______ from the fertical |
7.2° |
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in Syene |
0° |
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the light rays coming from the sun are_____ and the Eath is Curved |
parallel |
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Earth is approximately______ Stadia |
250,000 |
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One stadia is_ |
40,000 Km |