How big is the ellipse that our planet travels in a year around the Sun? J.J. MüdespacherMexico City, Mexico Earth's orbit ...

Eccentricity of the Earth's orbit around the Sun. The fluctuation between a nearly circular and elliptical orbit drives cyclic changes in the Earth's environment, including the global carbon cycle.

A 128-minute orbit, according to Kepler's third law, works out to a semi-major axis of 8,413 km (5,228 mi). Such an object with less than 0.25 eccentricity (a roughly circular orbit), therefore ...

An international team of scientists has found a fascinating new planetary system around a star similar to our sun. The system ...

Changes in Earth's orbit have helped pace climatic change for millennia. Scientists are now trying to understand whether - and how - these changes remodeled the landscapes our ancient ancestors ...

An international team led by researchers in Japan and Europe has discovered a new multi-planet system around a Sun-like star, ...

Changes in Earth's orbit have helped pace climatic change ... principally affected by variations in the cumulative effect of eccentricity and precession (eccentricity modulated precession ...

There's nothing innate about the Earth or its atmosphere that marks the boundaries of low Earth orbit. This is a distinction ...