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How many days of the year does the equator have a 90 degree sun angle?
Two: the spring and autumn equinoxes.
How many hours and minute and seconds are in a year?
Using the tropical year (the time between two vernal equinoxes) as opposed to the sidereal yea (the time the earth takes to get back to where it started in its orbit), the year is 365 days 5 hours 48 minutes 46 seconds long. 1 day = 24 hours → the year is 8765 hours 48 minutes 46 seconds ≈ 8765.813 hours 1 hour = 60 minutes → the year is 525,948 minutes 46 seconds ≈ 525,948.767 minutes 1 minutes = 60 seconds → the year is 31,556,926 seconds long
At what rate does the angle of sunlight rays change?
About 15 degrees per hour but depends on location and time of year. Most true on equator at equinoxes
How many days and weeks are there in a year?
There are approximately 365.2425 days in a year in the Gregorian calender, and 7 days in a week. So, there are approximately 52.177 weeks per year. Rounding down gives us 52 weeks and 365 days in each year, except for leap years. Note that 52 weeks equals 364 days (52 x 7 = 364), which is not quite 1 year. The length of a year presently is closer to 365.2422 days so in the year 4000 they might adjust so that the astronomic equinoxes and solcistes realign.
What are the days of March 21 and September 21 known as?
They're widely and erroneously known as the equinoxes, but they're not.The equinoxes are points on the map of the sky, not points in time.March 21 and September 21 are the dates near which the sun reachesand passes the equinoxes.
How many times a year do equinoxes occur?
There are two equinoxes (i.e. vernal/spring and autumnal/fall) every year.
How many times in a year day and night are of equal duration anywhere on earth?
That happens twice, at the "equinoxes".
Which two eqinoxes in the month?
There are two equinoxes per year, separated by about 6 months. There will never be two equinoxes in one month.
How many times each year do you have days in which the day and night are of equal duration and what are the names of each of these days?
Equinox
What are the difference between the equinoxes and the solstices?
The equinoxes and solstices are the first days of seasons. On the equinoxes, night and day is the same length. On the solstices, the day is either the longest or the shortest day of the year, depending on which solstice it is and which hemisphere you are in,
How many equinoxes do you have in a year?
Here in my neighborhood, we have two. The sun reaches one on March 21 and the other around September 22.
Why are the equinoxes special times during the year?
The year has two equinoxes, which are the days on which the night and day are of equal length. They happen when the apparent position of the Sun (on the ecliptic) crosses the Earth's equator.The equinoxes are usually March 21 and September 22, and on those days the Sun has a declination of zero and is overhead at the equator.
Does the leap day affect when equinoxes and solstices occur?
Yes. If we did not insert the leap day during leap year, the calendar date of the equinoxes and solstices would change and eventually come at very different times in the calendar year. The whole purpose of Leap Year/Leap Day is to keep our calendar aligned with the equinoxes, solstices, and seasons in general.
What phenomena accounts for the 26000 year wobble which shifts poles and equinoxes?
precession
1st equalest day of the year?
The equinoxes are the two dates each year when the day and the night are of equal length.
What is significant about equinoxes?
The year has two equinoxes, which are the days on which the night and day are of equal length. They happen when the apparent position of the Sun (on the ecliptic) crosses the Earth's equator.The equinoxes are usually March 21 and September 22, and on those days the Sun has a declination of zero and is overhead at the equator.
Which of these occurs between the dates of the solstice?
Equinoxes
