aphelion

noun

aph·elion a-ˈfēl-yən How to pronounce aphelion (audio)

ˌap-ˈhēl-

plural aphelia a-ˈfēl-yə How to pronounce aphelion (audio)

ˌap-ˈhēl-

: the point farthest from the sun in the path of an orbiting celestial body (such as a planet) compare perihelion

Did you know?

Aphelion and perihelion are troublesome terms. Which one means a planet is nearest to the sun and which means it is farthest away? An etymology lesson may help you keep those words straight. Just remember that the "ap" of aphelion derives from a Latin prefix that means "away from" (the mnemonic "'A' for 'away'" can help too); peri-, on the other hand, means "near." And how are aphelion and perihelion related to the similar-looking astronomical pair apogee and perigee? Etymology explains again. The "helion" of aphelion and perihelion is based on the Greek word hēlios, meaning "sun," while the "gee" of apogee and perigee is based on gaia, meaning "earth." The first pair describes distance in relation to the sun, the second in relation to the Earth.

Example Sentences

Recent Examples on the Web On Independence Day, the Earth with reach its aphelion — its furthest point from the Sun — at 3:10 a.m. in Baltimore.

Christine Condon, baltimoresun.com, 2 Jan. 2022 That moment, called aphelion, will occur when the distance between the two celestial bodies stretches to more than 94.5 million miles.

NBC News, 5 Jan. 2022 Though perihelion occurs during winter in the Northern Hemisphere and aphelion occurs during summer, Earth's elliptical orbit around the sun does not cause the seasons.

NBC News, 5 Jan. 2022 On Independence Day, the Earth will reach its aphelion — its furthest point from the Sun — at 3:10 a.m. in Baltimore.

Christine Condon, baltimoresun.com, 2 Jan. 2022 Officially, aphelion occurs at 6:27 p.m. EDT on July 5.

Eric Mack, Forbes, 5 July 2021 Our star is at aphelion on July 5, 2021, the point of the Earth’s slightly elliptical orbit that is farthest away from the Sun.

Jamie Carter, Forbes, 10 June 2021 The closest of these run-ins occurs when Earth reaches aphelion, or its farthest point from the sun, and when Mars reaches perihelion, its closest point to the sun.

Jennifer Leman, Popular Mechanics, 5 Oct. 2020 Apart from Mercury, no other natural object in our solar system is known to have a smaller aphelion—the point at which an orbiting body is farthest from the sun.

Katherine J. Wu, Smithsonian Magazine, 21 Jan. 2020 See More

单词	aphelion
释义	aphelion noun aph·elion a-ˈfēl-yən ˌap-ˈhēl- plural aphelia a-ˈfēl-yə ˌap-ˈhēl- : the point farthest from the sun in the path of an orbiting celestial body (such as a planet) compare perihelion Did you know? Aphelion and perihelion are troublesome terms. Which one means a planet is nearest to the sun and which means it is farthest away? An etymology lesson may help you keep those words straight. Just remember that the "ap" of aphelion derives from a Latin prefix that means "away from" (the mnemonic "'A' for 'away'" can help too); peri-, on the other hand, means "near." And how are aphelion and perihelion related to the similar-looking astronomical pair apogee and perigee? Etymology explains again. The "helion" of aphelion and perihelion is based on the Greek word hēlios, meaning "sun," while the "gee" of apogee and perigee is based on gaia, meaning "earth." The first pair describes distance in relation to the sun, the second in relation to the Earth. Example Sentences Recent Examples on the Web On Independence Day, the Earth with reach its aphelion — its furthest point from the Sun — at 3:10 a.m. in Baltimore. Christine Condon, baltimoresun.com, 2 Jan. 2022 That moment, called aphelion, will occur when the distance between the two celestial bodies stretches to more than 94.5 million miles. NBC News, 5 Jan. 2022 Though perihelion occurs during winter in the Northern Hemisphere and aphelion occurs during summer, Earth's elliptical orbit around the sun does not cause the seasons. NBC News, 5 Jan. 2022 On Independence Day, the Earth will reach its aphelion — its furthest point from the Sun — at 3:10 a.m. in Baltimore. Christine Condon, baltimoresun.com, 2 Jan. 2022 Officially, aphelion occurs at 6:27 p.m. EDT on July 5. Eric Mack, Forbes, 5 July 2021 Our star is at aphelion on July 5, 2021, the point of the Earth’s slightly elliptical orbit that is farthest away from the Sun. Jamie Carter, Forbes, 10 June 2021 The closest of these run-ins occurs when Earth reaches aphelion, or its farthest point from the sun, and when Mars reaches perihelion, its closest point to the sun. Jennifer Leman, Popular Mechanics, 5 Oct. 2020 Apart from Mercury, no other natural object in our solar system is known to have a smaller aphelion—the point at which an orbiting body is farthest from the sun. Katherine J. Wu, Smithsonian Magazine, 21 Jan. 2020 See More Word History Etymology New Latin, from apo- + Greek hēlios sun — more at solar First Known Use 1656, in the meaning defined above
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aphelion

noun

Did you know?

Example Sentences

Word History