astronomy - time and earth-moon-sun cycles
In which month does the Summer Solstice occur?
June
What is the astronomical significance of one day?
the time taken for Earth to rotate once
What is the astronomical significance of one year?
the time taken for Earth to orbit the Sun
Which way does the Earth rotate?
from West to East
By how many minutes is a sidereal day shorter than a solar day?
4 minutes
In which month and day does the Sun have a declination of -23 1/2 degrees?
December 21st
What is the astronomical significance of an equinox?
The Sun lies on the celestial equator
By how many degrees does the Earth spin in one hour?
15 degrees
Describe the shape of the waning cresent/waxing cresent
a "c" kind of shape
Describe the shape of the Full Moon
Circle
How much degrees does the Earth rotate every 24hrs?
360 degrees (15 degrees x 24 hours = 360 degrees)
What is the shape of Earth
Oblate Spheroid
What is the shape of the Moon?
also Oblate Spheroid
What do Sundials indicate?
Apparent Solar Time
What do clocks and watches indicate?
Mean Solar Time
How old was the oldest lunar calendar?
34,000 years old
What is the definition of Apparent Solar time?
Time measured using a sundial at a particular location