about how many days are in an earth year and how many hours in an earth day
so, 1 day on earth is approximately equal to 2 days. Now the second question, This shows that sunlight takes about 13 minutes to reach mars. The above screen is taken from the link below: http://image.gsfc.nasa.gov/poetr... Note: These settings will be stored on your computer and will only affect your future views of the countdown. They will not apply to countdowns shared with other users. Jupiter's revolution time is 11.86 Earth years, or 4,332 days. The planet's lengthy revolution time is due to its distance from the sun. In addition to being further away from the sun than Earth, Jupiter has a different physical composition and magnetic field. The surface of Earth at the equator is rotating at about 1000 miles per hour, while Jupiter's equatorial cloud-tops are moving nearly 28,000 miles per hour. One day in Jupiter is 9 hours 50 minutes as compared to Earth. Sunlight takes 12 minutes 27 seconds to reach Mars, hence an increase of 4 minutes 8 seconds after it reaches Earth. But these are calculated considering the average distances of the planets and the Sun. (Note that the distance varies across a year.) Best Answer: 365.25 -- that's why we have a leap year every four years, to catch up with the 1/4 day that is not accounted for every year. Your qualification exactly makes the answer somewhat complex. The short answer is 365.25 days per year but there is more. The extra quarter day comes from leap years which are normally 1 out of 4. However years divisible by 100 are not leap years, except that every year divisible by 400 is a leap year. This all amounts to 365.2425 days per year. If this isn't enough, the number of days in a year is actually changing slowly. The spinning of the earth is slowing down so days are getting longer by about 0.003 seconds per year. It takes the planet Neptune about 165 Earth years or 60,190 Earth days to fully orbit the sun, which is equal in time to 1 year on Neptune. Neptune is the eighth planet in the solar system and is around 2.8 billion miles away from the sun. Jupiter's period of revolution around the sun is approximately 11.86 Earth years, which comes out to around 4,332 days. This revolution period is due to Jupiter's average orbit distance of 483.5 million miles. By comparison, the Earth's average orbit distance is only approximately 93 million miles. However, the Gregorian calendar has only 365 days in a year, so if we didn't add a leap day on February 29 nearly every four years, we would lose almost six hours off our calendar every year. After only 100 years, our calendar would be off by around 24 days! We add a Leap Day on February 29, almost every four years. Unlike the Earth, Saturn orbits the sun in an elliptical shape. Saturn reaches its equinox every 15 Earth years, as Cassini observed in 2009. Saturn rotates more quickly than the Earth. A day on Saturn, a single rotation, takes about 10.7 hours to complete. Leap years are needed to keep our modern day Gregorian calendar in alignment with the Earth's revolutions around the sun. It takes the Earth approximately 365.242189 days – or 365 days, 5 hours, 48 minutes, and 45 seconds – to circle once around the Sun. This is called a tropical year, and is measured from the March equinox.
365.242189 days