Why are there 365 days in one year?

Answer 1

Actually it is closer to 365.25 days in a year and we use the leap year to keep things in balance.

The reason for this is because that is the time it, currently, takes for the Earth to revolve around the sun. In 5 billion years or so the sun will expand to a red giant, consuming the inner planets and pushing the Earth to a farther orbit, thus increasing our year. Of course all life will have been boiled off the planet by then.

Our day is 24 hours long because, currently, that is the time it takes to for the earth to complete one revolution. However, the drag on the Earth from the moon is slowing our planet down, so the dinosaurs had a shorter day then we do.

The month is 30 days long because that is about how long it takes for the moon to revolve around the Earth. But, that doesn't fit into the year long calendar so we have to adjust our months to fit it.

All these things were figured out long ago by people like the Aztecs, the Egyptians, the Mayans and the people who built Stonehenge. They needed to know this so they could know when to plant their crops and when to harvest them. If they didn't plant them in time, or planted them too early then the crops would fail and they would starve. This important job was given to the priests and caused such monuments like Stonehenge to be built. Stonehenge is just the largest such monument built, there are several others similar to it that have been constructed by other civilizations around the world.

Jules Caesar messed with our year by creating another month for it July. His son Augustus did the same thing creating August.

See history does have some value.

Answer 2

because this is the exact time when the earth completes its full rotation around its own axis.
The Earth takes 365 ¼ days to revolve around the Sun.
The Earth rotates 365 ¼ times as it revolves around the Sun.

If you have a question about ¼:
Leap Year occurs every 4 years. This is because each 4 times around the Sun, there is a total of one extra day. (¼ + ¼ + ¼ + ¼ = 1) This day is added on February 29th every fourth year, making that year 366 days long.

Answer 3

Actually, there isn't. A year is one complete revolution of Earth around Sun. (Technically, that is not "the Sun," but just "Sun". "Sun" is the name for our star.) It is about 365.25 days. That is why leap day is every four years. It is not exactly a fourth of a day, but that is all you'll need to know. Our orbit around Sun is degrading. A very long time from now, our year will be not 365.25 days long, but possibly 243.57 days long. By that time though, our "day" as we know it will be far shorter due to the slowing down of the rotation of Earth.

To sum things up, our year is approximately 365 days because it takes us about 365 days to orbit Sun.

Answer 4

Because:
1. the Earth takes one day to spin on its axis
2. the Earth takes 365 and one-fourth of those days to revolve around the Sun
3. Every fourth year (if divisible by 4) there is an extra day (leap year) to catch up those left-over fourths.
P.S. to Quantum PI: the name of our sun is Sol.

Answer 5

It takes 24 hours for the earth to rotate once. It takes 365 rotation for Earth to cirlce the sun.

Answer 6

Cause it takes Earth 365 days (365.25 days to be exact) to complete one revolutiion around the sun.

Answer 7

Because that how long it takes for Earth to orbit around the Sun one time.