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Astronomy and Cosmology
Astronomy and Astrophysics
Orientation of the Earth, Sun and Solar System in the Milky Way
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[QUOTE="fizixfan, post: 5742592, member: 506800"] Thanks for your input. Yes, the Earth's orbit around the Sun is elliptical, but it's very nearly (97%) circular. Earth's apogee distance from the Sun is 152.1 million km, and its perigee distance is 147.1 million km. The orbit is shown to scale in the diagram below. Looks much like a circle, doesn't it? The Earth-Sun system orbits a common center of mass called the barycenter. But because the Sun is so much more massive (99.9% of the mass of the entire solar system), the Earth-Sun barycenter is only about 449 km from the center of the Sun. [ATTACH=full]195307[/ATTACH] "Super Galactic Center" is not an astronomical term, as far as I know. If you mean the Galactic Center, I still have trouble visualizing what you mean by "a perpendicular line to Earth's orbit." A diagram might help. [/QUOTE]
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Astronomy and Cosmology
Astronomy and Astrophysics
Orientation of the Earth, Sun and Solar System in the Milky Way
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