How To Use Aphelion In A Sentence
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Scotsman James Croll combined the eccentricity of the orbit and the precession and in the 1860s and 1870s presented his ideas on the effects of the cycles and how they might influence climate, especially the colder winters when they correspond with the aphelion.
Milankovitch cycles
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In order for this result to be produced, the earth must reach that part of its orbit known as aphelion, where the distance from its controlling centre is greatest, so that the eccentricity of the moon's orbit is always an indication of the position of the earth in its relation to the sun.
Aether and Gravitation
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This total solar eclipse occurred near Aphelion , the point in Earth's elliptical orbit farthest from the Sun, and so the Sun was near its smallest apparent size.
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Figure 1: Position of the equinoxes, solstices, aphelion, and perihelion on the Earth's orbit.
Earth-Sun geometry
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There are small cyclic variations in those apparent sizes because the Earth-Moon distance changes as the latter moves between perigee and apogee, and the Earth-Sun separation alters as the former moves between perihelion and aphelion.
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The area of a sphere whose radius is equal to the earth's distance from the sun in aphelion being to the sun's area as 218. 1² to 1, while the reflecter of the solar pyrometer intercepts a sunbeam of 3,130 square inches section, it follows that the reflector will receive the radiant heat developed by 3,130/
Scientific American Supplement, No. 458, October 11, 1884
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This is because at aphelion the planet is moving slowest, and consequently it is less likely to pass across the Sun during the critical window.
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At the opposite point of its orbit, where it will be in "aphelion," or farthest from the sun, the sun will only appear about 19 minutes in diameter.
To Mars via The Moon An Astronomical Story
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So whether or not Pluto is moving towards perihelion or aphelion that doesn't determine its "spring" or "autumn", does it?
New Hubble Images Show Pluto is Changing | Universe Today
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The first colonists arrived only to learn that they had to contend with a winter twenty times the duration of summer and so extreme it froze the atmosphere to the surface well after aphelion to the primary.
Mandala « A Fly in Amber
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This affects the climate because the influx of solar energy to our planet would then vary between perihelion and aphelion by a larger proportion than at present.
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In other positions it is, therefore, as the cosines of the eccentric anomaly, as in the former case; but in this last case it is an addititious force at the perihelion, and an ablatitious force at the aphelion, whereas the first disturbing force was an ablatitious force at the perihelion, and an addititious force at the aphelion; therefore, as we must suppose the planet to be in equilibrium at its mean distance, it is in equilibrium at all distances.
Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence
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This affects the climate because the influx of solar energy to our planet would then vary between perihelion and aphelion by a larger proportion than at present.
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In 12,900 years, the North will have colder winters because Earth will be furthest from the Sun (aphelion) in January.
Milankovitch cycles
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When the orbit is more elliptical, the perihelion is closer to the Sun and the aphelion is farther away than when the orbit is more circular.
Milankovitch cycles
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For objects orbiting Earth, periapsis and apoapsis are known as perigee and apogee; for objects orbiting the Sun, these locations are known as perihelion and aphelion.
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Comets, with their hugely eccentric orbits, may pass far beyond the outer planets to spend their aphelion in the vast interstellar darkness beyond the Kuiper Belt .
Planet-x.com.au » artnouveauho: Aphelion
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Criminy, I almost forgot: on July 4th, at roughly 08: 00 UT, the Earth was at aphelion.
Does the Sun Look Smaller to You? | Disinformation
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Furthermore, any resonance with the Earth is illusory in that Mercury is not well placed for observations except during its brief greatest elongations near its aphelion.
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At the perihelion this excess of tangential velocity creates a resistance, which urges the planet towards the sun, and at the aphelion, the deficiency of tangential velocity urges the planet from the sun, -- the maximum effect being at the apsides of the orbit, and null at the mean distances.
Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence
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Furthermore, any resonance with the Earth is illusory in that Mercury is not well placed for observations except during its brief greatest elongations near its aphelion.
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The difference between the perihelion and aphelion distances is about 3%, and therefore extraterrestrial irradiance is about 7% higher during the austral (Southern Hemisphere) summer than it is during the boreal (Northern Hemisphere) summer.
Factors affecting surface ultraviolet radiation levels in the Arctic
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The radius vector is shortest when the planet is at perihelion and longest at aphelion.
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Variations in the timing of perihelion and aphelion are caused by a ‘wobbling’ in the Earth's axis of rotation as it rotates around the Sun.
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It is at the equinoxes that the earth changes her distances from the sun most rapidly, and whether she is passing from her perihelion or from her aphelion, the density of the ether externally is changing in the subduplicate ratio of these distances and consequently at these times there will be the greatest disturbance of the electric equilibrium.
Outlines of a Mechanical Theory of Storms Containing the True Law of Lunar Influence