#ellipticalorbit — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #ellipticalorbit, aggregated by home.social.
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By coincidence, the Earth is near #Perigee at this time of year, being its closest to the #Sun. in its very slightly #EllipticalOrbit. Actual pergee will occur on 4 January 2025.
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By coincidence, the Earth is near #Perigee at this time of year, being its closest to the #Sun. in its very slightly #EllipticalOrbit. Actual pergee will occur on 4 January 2025.
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It's all due to the Earth's elliptical orbit. If the orbit was perfectly circular, the difference would be constant (if on the Greenwich meridian, 0; if at 8.6E as in this example, about 34 minutes). An elliptical orbit means the Earth moves more slowly when further from the Sun, and faster when near. Today, 4 Jan 2022, is the perihelion: the moment when the Earth is nearest the sun and moving fastest.
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It's all due to the Earth's elliptical orbit. If the orbit was perfectly circular, the difference would be constant (if on the Greenwich meridian, 0; if at 8.6E as in this example, about 34 minutes). An elliptical orbit means the Earth moves more slowly when further from the Sun, and faster when near. Today, 4 Jan 2022, is the perihelion: the moment when the Earth is nearest the sun and moving fastest.