Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.astronomy.com/magazine/ask-astro/2012/04/orbital-shapes
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What would cause Earthò??s orbit to become more circular instead of its present elliptical orbit, and has this ever happened before? | Astronomy.com
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What would cause Earthò??s orbit to become more circular instead of its present elliptical orbit, and has this ever happened before?

Bo Hill, Peachtree City, Georgia
Earth
NASA/NOAA/GSFC/Suomi NPP/VIIRS/Norman Kuring

Gravitational interactions among the planets cause the ellipticities of the orbits to oscillate periodically by a few percent over millions of years.

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