### Why does a year have 365 days but calculates to 364 days?

There is actually 364.something amount of days in an actual year and there is 365 days in a leap year A year is 365.24 days. This is calculated by the stars (sidereal year), we use a leap year to even out the minor discrepancies (2000 was not a leap year), but we are slightly off the sidereal year most of the time. The leap year has 366 days. Read More

### What is the Period of difference between a solar and a lunar year?

lunar year:354.37 days Tropical year (solar year): 365.24219 days sidereal year: 365.25636042 Read More

### How many days are there in solar year?

The solar year has 365 days, and 366 on leap years. Read More

### How many months does one leap year have?

One leap year of the Gregorian calendar has 12 months. One leap year of most lunisolar calendars, including the Hebrew calendar, has 13 months. A leap year is 12 months just like a common year. A leap year is longer than the solar year and a common year is shorter than the solar year by just one day. Read More

### Why are leap years included in the calendar?

Leap years in solar calendars are to make up for the fact that a year is not an exact multiple of a day. Leap years in luni-solar calendars are to make up for the fact that a year is not an exact multiple of a month. Read More

### How many more days are there in a leap year then a common year?

In solar calendars, like the Gregorian and Julian calendars, a leap year has one more day than a non-leap year (366 instead of 365). Read More

### What causes the solar day of a planet to be different from its sidereal day?

The sidereal day of a planet is the time it takes to rotate once on it's axis. The solar day is the time from sunrise to sunset. To see why they are different, let's image a planet that rotates very slowly. Every time it goes around its star once, it also rotates once on its axis. Since it rotates once on its axis per year, there is one sidereal day per year. Now, in order… Read More

### What planets day is more than half as long as its year?

The "Solar day" on Venus. Or, the "Sidereal day" on Mercury. Read More

### What planets days are longer than your year?

Venus "sidereal day" is longer than its year. Mercury's "solar day" is longer than its year. However, there is no planet in our solar system with a day longer than our year on Earth. Read More

### How long does it take for a day to pass on Neptune?

Neptune's sidereal rotation period is 16 hours 6 minutes 36 seconds. I can't find the precise length of a solar day there, but since Neptune's year is so long it would be only very slightly longer than that. (On Earth, the difference between the sidereal rotation period and the solar day is about 4 minutes; Neptune's year is 165 times longer, so the difference between the sidereal and solar days would be at most a… Read More

### Is a cosmic year the same as a leap year?

A cosmic year is 220 million years, the time it takes for the entire Milky Way galaxy to rotate once. If by a cosmic year you mean a sidereal year, the answer is still no. A sidereal year is the time it takes the Earth to go completely around the sun, which is 365 days, 6 hours, 9 minutes, and 9.54 seconds. The difference between the calendar year and the sidereal year (approximately 6 hours… Read More

### Why was a leap year established?

Leap year was established because of the rotations of the orbits. This caused the calendar and dates to be a little off each year. So man created leap year to even out the calendar to this orbit change. Without leap year we would be many days and even years off. Read More

### Which planet's day is more than half as long as its year?

Mercury has a "sidereal day" which is like that. Venus has a "solar day" which is like that. Read More

### Is a year on mars longer or shorter on earth?

This length of time for Mars to complete one orbit around the Sun is its sidereal year, and is about 686.98 Earth solar days Read More

### How long is one earth year to one year on Saturn?

The length of one sidereal Earth year is 3.39% the length of one sidereal Saturn year. In other words, the length of one sidereal Saturn year is 29.5 times the length of one sidereal Earth year. (A sidereal year is the time between alignments of the sun, the planet, and a distant fixed star.) Read More

### How long does the earth take to completeone orbit of the sun?

Our earth takes 365 days, 6 hours and 7 seconds to complete one orbit around sun . It is called the earth's sidereal year . The sidereal period of the earth about the sun , about 20 minutes longer than the solar year . One solar year is 365 days, 5 hours, 48 minutes and 46 seconds . Read More

### Define earth's solar and sidereal day?

== == A solar day is the length of time between two successive passes of the sun across the same spot in the sky (e.g. crossing the meridian, overhead). That time period is, on average, 24:00:00, hours, or one mean solar day. A sidereal day is the length of time between two successive passes of the fixed stars across the sky. That time period is 23:56:04, or one sidereal day. The difference occurs because, over… Read More

### What is the Earth's orbital period around the sun?

The orbital period of the Earth, known as the sidereal year, is the time taken for the Sun (as observed from the Earth) to return to the same position with respect to the stars of the celestial sphere. It is equal to 365.25636042 mean solar days (31,558,149.540 seconds), that is 366.25636042 earth rotations or sidereal days. The sidereal year is 20 minutes and 24 seconds longer than the tropical year, the year of the four… Read More

### Who started the leap year?

The leap year wasn't started by anyone. As scientists worked out all they know about the solar system they realised that the Earth takes 365 and a quater days to orbit the Sun. Therefore every four years there is an extra day made up = a leap year. Read More

### What is the similarities of light-year and leap year?

Nothing at all. "Leap Year" is caused by the fact that the rotation of the Earth and the orbital period of the Earth cannot be synchronized; "leap year" is the way we keep them matched up. "Light year" is the distance that light travels in one year. Read More

### Is the Jewish year lunar or solar?

Both. It's lunar, with leap-months every 2-3 years to keep in step with the solar seasons. Read More

### What is a leap year in the solar system?

A leap year just accounts for the fact that earth revolves around the sun once every 365.25 days. Instead of having a quarter of a day a year, we have one every 4 years. Read More

### What are some major characteristics of Venus?

Venus has 95 percent carbon dioxide in it's atmospheric composition therefore it has the strongest green house effect in the whole solar system. Venus shows Retrograde rotation. A sidereal year on Venus is shorter than a sidereal day on Venus. Venus's rotation is slowest in the whole solar system. Read More

### Was 2007 a leap year?

No, it was not. 2008 was a leap year, and 2012 will be a leap year. Leap years are always evenly divisible by 4, except for years ending in "00" which also have to be divisible by 400 in order to have 366 days. The extra day in a leap year is caused because the Earth takes about 365.24 days to circle the Sun, and the leap days minimize the difference between our calendars and… Read More

### Which planets day is longer than its year?

Venus. That's the "sidereal day" (rotation period). However, Venus has a "solar day" that's shorter than its year. Mercury is the planet with a "solar day" that's longer than its year. Read More

### Is leap year in February?

No. The leap day is in February, not the leap year. By having a leap day in February, that makes the year into a leap year. Read More

### What planet has a day and a year that are the same length?

There is no such planet in our solar system. The nearest case would be Venus. Venus has a "sidereal" day of about 243 Earth days and a year of about 225 Earth days. Read More

### Do leap years affect the birthdays of people not born on leap years?

No if you were not born on the leap day of the lep year then your birthday is not at all affected by theleap year because the leap year is making up for lost time in the regular year which is caused becasue the average year is not exactly 365 days it is slghtly more. So, on a leap year the extra time from other years are added up to equal one more full day… Read More

### What's the difference between a sidereal year and a synodic year?

A sidereal year is the time it takes for the sun to return to the same position in relation to the stars. A synodic year is the time it takes for a planet-sun alignment to reoccur. A synodic year is 20 minutes shorter than a sidereal year. Read More

### How many days in a year in 1993?

A typical solar year consists of 365 days, 1993 had 365 days. A leap year occurs once every 4 solar years and has 366 days (February has 29 days instead of the usual 28). The last leap year was 2008 and the next leap year will be in 2012. Read More

### Which planet's day is closest in length to its year?

Venus. The rotational (day) period is243.2 earth days, and the sidereal (year) period is 224.7 earth days, the only planet in our solar system that has a year that is shorter than a day. Read More

### Leap year in other calendars?

The Hebrew calendar adds a whole month every two or three years to keep pace with the solar year. Read More

### What planet has a day that is longer than the year?

Venus. The year is about 225 Earth days and the "sidereal" day is 243 Earth days. Or, the answer could be Mercury. Its year is 88 Earth days and "solar day" about 176 Earth days. Read More

### How many days is in a solar calendar year?

365.24 days. The extra .24 days per year is why we have leap years; to keep the calendar in synch with the seasons. Read More

### Why is the sidereal day longer than a solar day on venus?

Because Venus's spin is retrograde, that is to say it spins "backwards". (Also it travels around the sun faster than it spins on its axis, meaning the Venusian "day" is longer than a Venusian "year".) That is the Venusian SIDEREAL day which is its rotation period. The SOLAR day is how long the Sun takes to apparently travel once round the sky. That's from one Venusian "noon" to the next. The combination of retrograde spin… Read More

### How long are the days on Venus compared to the days on Earth?

The Earth rotates in about 23 hours and 56 minutes. That's called the "sidereal day". The sidereal day on Venus is about 243 Earth days. As a year on Venus is only about 224.7 Earth days, this makes Venus' day longer than its year. Venus is the only planet in our Solar System to have this feature. Read More

### How ofter does leap year happen?

Leap year happens every fourth year. For example, the last leap year was in 2004. The next leap year will be in 2012 Read More

### How long is a day and a year in mercury?

Year: 88 Earth days. Rotation period (sidereal day): 58.6 Earth days. Solar day: 176 Earth days. Read More

### The length of one day in Venus or even a year?

what is the sidereal day of venus? what is the sidereal day of venus? Read More

### What year is not a leap year?

Every 4th year is a leap year. 2000 was a leap year. When you want to know if a year is a leap year, find out if the difference between your year and 2000 can be divided on 4. Read More

### Is the next leap year in 2100?

2100 is not a leap year, and the next leap year will be 2016. Read More

### Was 2112 a leap year?

2112 will be a leap year. If you meant 2012, then it too was a leap year. Read More

### Hoe many hours are in a year?

It depends on what you mean by "year". A non-leap calendar year (365 days) is 8760 hours, and a leap year (366 days) is 8784 hours. A Julian year (365.25 days) is 8766 hours. A solar year or vernal equinox year (365.2424 days) is 8765.8176 hours (8765 h 49 min 3.36 s). A Gregorian year (365.2425 days) is 8765.82 hours (8765 h 49 min 12 s). The sidereal year used by astronomers is 365.256363051 days… Read More

### What is leap year or day?

A leap year has 366 days. Leap day is the extra day in a leap year, which is always on the 29th of February. Read More