Astronomy: Obeserving the Sky Flashcards
(36 cards)
Which civilization directly affected the development of our modern calendar?
Romans
The length of a day is__________________.
Earth rotating in its axis once
According to the _________ theory! the earth is at the center of the universe.
Ptolemaic
The first scientist to successfully use a telescope to observe the night sky was _____________
Galileo
If earth rotated faster, what would be shorter
Days
Copernicus theory was unpopular when he first proposed it because he stated that the sun was ____________________________
At the center of the universe
The first scientist to explain why planets orbit the sun was____________
Newton
The calendar used most widely today was first developed by the ______________
Romans
The time required for the earth to orbit the sun once is called a _________
Year
Most calendars organize time within a single unit called a _______
Year
A _________ is roughly the amount of I time required for the moo to orbit the earth once
Month
Ancient __________ cultures had very complex calendar system that linked the cycles of the sun, the moon, and Venus
Mayan
Ancient __________ cultures based their calendars in the moon and the sun. The number of months in their calendar alternated each year between 12 & 13 months.
Hebrew
Ancient __________ culture based their calendars on the sun, with twelve 30 day months and one 5-day month at he end of the year
Egyptian
Ancient ________ cultures made calendars as early as the fourteenth century B.C. based on the moons phases and positions in the sky
Chinese
Our modern calendar began with the early _________ calendar, which had 365 days in a year and 7days in a week
Roman
When astronomers determined that there we’re are about 365.25 days in year, Julius Caesar corrected this by ________________________
Adding 90 days to the calendar and adding a leap year every 4 years
The earliest record of astronomical observations is a 6,0000 a 7,000 year old group of stones near Nabta. Some of these stones would have lined up with the sun during the __________________
Summer solstice
The longest day of the year occurs on the day of the ____________________
Summer solstice
Some of the stones at _______________ are aligned with the sunrise during the winter and summer solstices
Stonehenge
Ancient __________ cultures could be predict eclipses as early as 1000 B.C.
Chinese
Ancient ________________ cultures precisely tracked and could forecast the position of the planet and the moon, which enabled them to make an accurate calendar
Babylonian
Ancient __________ cultures tried to understand the place of earths and humans in the universe using philosopher, logic, and mathematics
Greek
____________ Successfully explained why the phases if the moon and eclipses occur, and correctly argued that earth is a sphere
Aristotle
