Nowak- Early Astronomy
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What did ancient cultures base thie calendars on? | seasonal cycles of celestial objects
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| calendar | system for organizing time
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| year | time required for the Earth to orbit the sun once
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| month | roughly the amount of time for the moon to orbit the Earth once
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| day | the time required for the Earth to rotate once on its axis
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| Ancient Egyptian calendar | contained one 5 month day
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| Which ancient calendars were based on the sun? | Hebrew, Egyptian, and Mayan
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| Why did Julius Caesar added 90 days to the year 45 BC? | to put the seasons back to their original position
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| Most countries use this calendar | Gregorian
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| Ancient culture that invented algebra and our modern number system | Arabs
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| Ancient culture that made the earliest astrononmical observations | Nabta
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| Ancient culture that made an accurate calendar based on skilled forecasting | Babylonians
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| Ancient culture that could predict eclipses | Chinese
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| Ancient culture that use logic and geometry to explain eclipses and the phases of the moon | Greeks
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| Ancient culture that produced the world's oldest portable star map | Mayans
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| Some stones in circles that are aligned with the sunrise during the solstices | Stonehenge
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| Many buildings aligned with celestial bodies during certain astronomical events | Mayans
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| How did the earliest astronomers learn about the universe? | with their own eyes and minds
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| For ____ years Ptolemy's Earth-centered thoery remained the popular theory for the structure of the universe? | 1500
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| Copernicus thought | the planets orbit the sun and the sun was the center of the universe
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| Newton explained that the planets and the moon stay in orbit due to | gravity
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| Kepler stated that planets move in ______ orbits around the sun | elliptical
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| Brahe used _____ to measure the positions of planets and stars | mural quadrant
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| Galileo | first person to use telescope to observe celestial bodies
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| William Herschel discovered which planet? | Uranus
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| Which invention in the 1800's allowed astronomers to improve their observations of the sky? | photography
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| Hubble discovered that the fuzzy patches Herschel discovered were | other galaxies
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