Earth orbit

[jabrena]

• https://en.m.wikipedia.org/wiki/Earth%27s_orbit
• https://math.stackexchange.com/questions/512989/equation-of-earths-orbit-around-sun-ellipse

[jabrena]

• https://earthsky.org/tonight/earth-comes-closest-to-sun-every-year-in-early-january/
• https://www.timeanddate.com/astronomy/perihelion-aphelion-solstice.html
• http://www.astropixels.com/ephemeris/perap2001.html