Earth’s distance from the Sun (center-to-center) varies with mean values of 0.9832899 AU (147,098,074 km) at perihelion (closest) to 1.0167103 AU (152,097,701 km) at aphelion (most distant).
Sun. The perihelion is the point in the orbit of a planet, asteroid or comet where[& when] it is nearest to the sun. It is the opposite of aphelion, which is where [& when] the orbit of the object is farthest from the sun. The word perihelion stems from the Greek words peri, meaning near, and  Helios , meaning the Greek god of the sun. (The similar word, perigee, refers to the nearest point in some object's orbit of earth .). Therefore, the distance between the earth and the sun varies throughout the year. At its nearest point on the ellipse that is the earth's orbit around the sun, the earth is 91,445,000 miles (147,166,462 km) from the sun. This point in the earth's orbit is known as perihelion and it occurs around January 3. The earth is farthest away from the sun around July 4 when it is 94,555,000 miles (152,171,522 km) from the sun. This point in the earth's orbit is called aphelion.  Introduction. Earth revolves around the Sun in an elliptical orbit with a mean eccentricity of 0.0167. As a result, Earth’s distance from the Sun (center-to-center) varies with mean values of 0.9832899 AU (147,098,074 km) at perihelion (closest) to 1.0167103 AU (152,097,701 km) at aphelion (most distant). Extreme Perihelion and Aphelion. The extremes in Earth's perihelion and aphelion distances for the 21 st Century are listed below. Earth’s mean distance from the Sun at perihelion is 0.9832899 AU (147,098,074 km). Earth’s mean distance from the Sun at aphelion is 1.0167103 AU (152,097,701 km). The place where the planet is closest to the Sun is called perihelion. When the planet is furthest away from the Sun, it is at aphelion. The words aphelion and perihelion come from the Greek language. In Greek, helios mean Sun, peri means near, and apo means away from. When Earth is at perihelion, it is about 147 million km (91 million miles) from the Sun. When it is at aphelion, it is 152 million km (almost 95 million miles) from the Sun. Earth is about 5 million km (more than 3 million miles) further from the Sun at aphelion than at perihelion! The Earth is closest to the Sun, or at the Perihelion, about two weeks after the December Solstice, when it is winter in the Northern Hemisphere. Conversely, the Earth is farthest away from the Sun, at the Aphelion point, two weeks after the June Solstice, when the Northern Hemisphere is enjoying warm summer months. Perihelion in Seattle, Washington, U.S.A. is on. Saturday, January 2, 2016 at 2:49 PM PST (Change city) The Earth is closest to the Sun or at its Perihelion two weeks after the December solstice and farthest from the Sun or Aphelion, two weeks after the June Solstice. In 2015, the Earth will reach its Perihelion at 22:49 UTC on January 2, 2016. Conversely, the Earth is farthest away from the Sun, at the Aphelion point, two weeks after the June Solstice, when the Northern Hemisphere is enjoying warm summer months. Perihelion in Seattle, Washington, U.S.A. is on. Aphelion is the point in a planet's orbit when it is furthest from the Sun; perihelion is the point at which it's closest. These terms can also be used for any other objects that orbit the Sun such as. asteroids and comets. At aphelion, Earth receives 6.9% less of the solar radiation than at perihelion. Aphelion happens around July 4, so this means slightly cooler summers for the Northern Hemisphere and slightly cooler winter for the Southern Hemisphere.. Perihelion is the closest point to the sun in a planet's orbit. The perihelion and aphelion are the nearest and farthest points (apsides) of a body's direct orbit around the Sun. The perihelion is the point in the orbit of a planet, minor planet, or comet, where it is nearest to the Sun. It is the opposite of aphelion, which is the point in the orbit where the celestial body is farthest from the Sun. The word perihelion stems from the Ancient Greek words peri, meaning near, and  helios , meaning the Sun. Aphelion derives from the preposition apo, meaning away, off, apart Thus, they all have a closest and a farthest point from the sun: a perihelion and an aphelion. Orbital eccentricity measures the flatness of the orbit. Earth comes closest to the sun every year around January 3. It is farthest from the sun every year around July 4. It is the opposite of aphelion, which is where [& when] the orbit of the object is farthest from the sun. The word perihelion stems from the Greek words peri, meaning near, and  Helios , meaning the Greek god of the sun. (The similar word, perigee, refers to the nearest point in some object's orbit of earth .). Making the world better, one answer at a time. Perihelion is the point in an object's orbit around the sun where it is closest to the sun. Comes from greek peri- =near. Anahelion is the opposite--the point in an object's orbit around the sun where it is farthest from the sun. Comes from greek ap --=away.
https://simple.wikipedia.org/wiki/Perihelion http://geography.about.com/od/physicalgeography/a/orbitsun.htm http://www.astropixels.com/ephemeris/perap2001.html http://www.windows2universe.org/physical_science/physics/mechanics/orbit/perihelion_aphelion.html http://www.timeanddate.com/astronomy/perihelion-aphelion-solstice.html http://www.timeanddate.com/astronomy/perihelion-aphelion-solstice.html http://www.answers.com/Q/What_is_aphelion_and_perihelion https://en.wikipedia.org/wiki/Perihelion_and_aphelion https://simple.wikipedia.org/wiki/Perihelion http://www.answers.com/Q/What_is_the_difference_between_perihelion_and_aphelion
what is earth perihelion and aphelion