Extremely Elliptical Orbit

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• Highly Elliptical Orbit — (HEO) is an elliptic orbit characterized by a relatively low altitude perigee and an extremely high altitude apogee. These extremely elongated orbits can have the advantage of long dwell times at a point in the sky during the approach to and… …   Wikipedia

• Orbit — This article is about orbits in celestial mechanics, due to gravity. For other uses, see Orbit (disambiguation). A satellite orbiting the Earth has a tangential velocity and an inward acceleration …   Wikipedia

• Sun-synchronous orbit — Diagram showing the orientation of a Sun synchronous orbit (green) in four points of the year. A non sun synchronous orbit (magenta) is also shown for reference A Sun synchronous orbit (sometimes called a heliosynchronous orbit) is a geocentric… …   Wikipedia

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• Newton's theorem of revolving orbits — Figure 1: An attractive force F(r) causes the blue planet to move on the cyan circle. The green planet moves three times faster and thus requires a stronger centripetal force, which is supplied by adding an attractive inverse cube force. The …   Wikipedia