Carefully weigh the known risks of bisphosphonate drugs against their potential benefits. En espaÃ±ol | Q. I'm a 62-year-old woman with osteoporosis (as determined by a -2.87 on my bone density scan). I've been taking Fosamax along with calcium and vitamin D supplements for the past five to six years. In that time I've had three stress fractures of my feet.
Earth's orbit. Earth's orbit is the path through which the Earth travels around the Sun. The average distance between the Earth and the Sun is 149.60 million kilometers (92.96 million miles), and a complete orbit occurs every 365.256 days (1 sidereal year), during which time Earth travels 940 million kilometers (584 million miles). Earth's orbit has an eccentricity of 0.0167.
Earth moves around the Sun in an elliptical orbit. Earth's orbit is almost a perfect circle; its eccentricity is only 0.0167! Pluto has the least circular orbit of any of the planets in our Solar System. Pluto's orbit has an eccentricity of 0.2488. The Sun isn't quite at the center of a planet's elliptical orbit. An ellipse has a point a little bit away from the center called the focus. The Sun is at the focus of the ellipse. Because the Sun is at the focus, not the center, of the ellipse, the planet moves closer to and further away from the Sun every orbit.