2007-12-18 13:06:54 · 13 answers · asked by arjay_575 1 in Science & Mathematics ➔ Astronomy & Space
There is no reason why the length of the year should be an even number of days. In the case of Earth, it is not. It takes 365 and a quarter days for Earth to return to the same spot in its orbit that it was at a year ago, that's just how it is.
2007-12-18 15:11:47 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Basically because that's how much time it takes for the earth to complete one orbit around the sun. We have 7 months with 31 days which equals 217 days. Four months with 30 days which equals 120 days and 1 month with 28, This gives us 365 per year, but every 4 years February has 29 days this is so our calendars don't go out of whack. Since it takes the Earth 365.25 days to orbit the sun after about 100 years Spring would occur in April. That's the best I can do, maybe someone else can clear things up.
2007-12-18 21:21:00 · answer #2 · answered by the shadow knows 1 · 0⤊ 0⤋
Because it takes exactly 365.25 Earth days for Earth to revolve around the sun. Every four years and the .25 adds up to one extra day hence a leap year were we subtract a day from the calender to keep the extra days from piling up.
2007-12-18 21:11:35 · answer #3 · answered by toombs_reid 2 · 1⤊ 0⤋
The earth rotates on its axis 365.25 times for every trip it make around the sun.
2007-12-18 21:10:46 · answer #4 · answered by Anonymous · 2⤊ 0⤋
Actually, it averages out to 365.2425 days. The full leap year rule says that the year 2000 is a leap year, but years 2100, 2200, and 2300 are not.
The earth actually takes 365.24237 days to "go around" the sun, so the calendar is a little bit out of wack. In about 7900 years, it will be out by one day. Maybe the calendar makers will put a leap day into the year 10,000.
2007-12-18 21:19:42 · answer #5 · answered by morningfoxnorth 6 · 1⤊ 0⤋
that's how long it takes earth to go around the sun. the 1/4 day is added up over 4 years and then we have a leap year - Feb 29.
2007-12-18 21:11:01 · answer #6 · answered by Anonymous · 2⤊ 0⤋
The question back to you is why should the time taken to orbit the sun be an exact number of revolutions of the Earth on its axis?
It would be handy if it was exactly 365 days, but chance does not work like that.
2007-12-18 21:22:57 · answer #7 · answered by nick s 6 · 2⤊ 0⤋
Hi. There are two kinds of 'day'. One is based on how many times the Sun is exactly south (a solar day) and one is based on how many times a particular star in exactly south (a sidereal day). The sidereal day is more accurate for determining a 'year' since it better describes how long the Earth's orbit is. http://en.wikipedia.org/wiki/Sidereal_year
2007-12-18 21:20:13 · answer #8 · answered by Cirric 7 · 0⤊ 0⤋
why couldnt it? do u know what a day and year are? a day is one rotation of the earth and a year is how long it takes the earth to go around the sun once.
so all thats saying is that it takes 365 days and 6 hours for the earth to go around the sun once. i dont get how its that hard to understand...
2007-12-18 21:13:10 · answer #9 · answered by Anonymous · 1⤊ 0⤋
because of leap year which happens every 4 years so 1/4=.25
2007-12-18 22:02:08 · answer #10 · answered by Valentine Smith 5 · 0⤊ 0⤋