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Nowak- Early Astron.

Nowak- Early Astronomy

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