For all you Aliens out there, a year on Earth lasts 365.25 days. The 0.25 means that every Four years we have to have what is known as a Leap Year of 366 days just to keep the calender in check. According to a book about time that I read, one year on earth equals 365 days, 5 hours, 48 minutes, and 46 seconds.
Before anybody can touch that question, you have to explain what you mean by 'aligned'. Every planet in the solar system is on the same line from the sun that the Earth is on at least once a year. One or two of them do it more than once a year.
A year on our planet is 365.25 Earth days. Other planets take more or less time depending on their orbital distances from the Sun. Mercury - 88 Earth days Venus - 225 Earth days Mars - 687 Earth days Jupiter - 11.86 Earth years Saturn - 29.46 Earth years Uranus - 84 Earth years Neptune - 164.8 Earth years Pluto (now a dwarf planet) - 247.7 Earth years
one year exactly
inner
An exact figure is never possible. However, one estimate is that: at the end of the year 2009, the world population will be approximately 6,793,200,000 (approaching 7 billion) persons.
356 days.......
It is one mercury year long
MARS
One Earth year.
11.68 years
depends which planet your talking it about Mercury about 88days Mars 687 days
It takes the earth one year to make one rotation around the Sun!
One martian year is roughly 687 earth days long.
The Earth revolves around the sun once per year.
a year is determined on how long the planet takes to orbit the sun. When calculating the year of a planet we use earth days. __________________ Yes, distance counts. The farther a planet is from the sun, the longer it takes that planet to complete one full orbit.
It is 9 months
One year on the planet Neptune is the equivalent of 164.79 years on Earth. A day on Neptune is equal to 16 hours and 6 minutes.