Well the date it was the last time was acually March,22,1470
The maximum time difference between two locations on Earth is 24 hours, which occurs when they are on opposite sides of the International Date Line.
no actually its because of the earths 23.5 degree tilt and so one half of the earth( northern hemisphere, southern hemisphere) is either facing away or toward the earth. But in spring and fall neither of the hemispheres are facing the sun. so basically the distance of the sun does not matter for temature because the earths orbit is not eliptical enough to make a difference in tempature.
There would be many changes. First there would be only one season all the time with minor differences when Earth is at perihelion and aphelion. The time of sunrise and sunset would not change and at the equator there would be 12h or night and day.
In most parts of the world, Earth Hour 2009 took place from 8:00pm-9:00pm on the last Saturday of March. In Australia, Earth Hour was held from 8:30pm to 9:30pm.
Geothermal energy will last as long as the earth lasts, so it technically won't run out. As long as the earth's core remains molten and the sun heats the surface of the earth, we'll have geothermal energy.
January 3, 2010 was the date of the "most recent" perihelion. Hopefully, not the "last" one.
I think the most recent was actually January 4, 2001 at 5am eastern standard time.
The earth's orbit around the sun is not a perfect circle, so there is a point at which we are nearest to the sun, and a point at which we are farthest from it. The point in the orbit at which we are nearest the sun is called "perihelion". The earth passes that point at some time during the first few days in January. In 2011, it happened on January 3. The point in the orbit at which we are farthest from the sun is called "aphelion". We pass it at some time during the first few days of July.
The last time Saturn was at perihelion was in July 2003. Saturn's orbit takes about 29.5 Earth years. So, that means the next time Saturn will be at its closest to the Sun will be at the end of the year 2032.
Perihelion, the point in Earth's orbit where it is closest to the sun, typically occurs in early January each year.
It is NOT the June solstice, as some may assume. It is a few days later. This year it was, I believe, July 4. After that point, the earth began to accelerate and will continue to do so until it reaches perihelion in early January. The solstice has to do with the tilt of the earth's axis, and our farthest approach to the sun, aphelion, has to do with the eliptical shape of our orbit around the sun. These two things are independent, and we happen to be living at a time when the solstices are very close to aphelion and perihelion. Nothing requires that earth's axial tilt must have a certain orientation to our orbit. In fact, they are moving relative to each other all the time as a result of what is called precession.
Planets orbit stars in elipses, or elliptical orbits, which means their orbit around the star is an oval shape, as opposed to a circle. That means that at one point they will be closest to the star, and at another point they will be the farthest. Perihelion is when the planet is closest to the star, so the perihelion date is the date of which the planet is closest to the star.
Jupiter is closest to Earth when it is at opposition, which is when it is directly opposite the sun in the sky. At opposition, Jupiter is at its largest and brightest, making it an ideal time to observe the planet.
On January 2 or 3 each year.
Earth reaches 'perihelion' ... the point in its orbit that's closest to the sun ... at some time during the first few days of January each year.
This happens when earth is at perihelion, its closest approach to the sun, usually some time between January 2 and January 5. It does not happen at the solstice, December 21, as some think. The solstices are not lined up perfectly with aphelion and perihelion.
There is no official date yet but my guess is around the same time next year as it did this year.