The Astronomical Register, Vol. 8 (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from The Astronomical Register, Vol. 8

On a method of Determining the Orbit of a Planet from Three Observations; by Professor Cayley.

The author gave an oral explanation of this paper, which he said was rather geometrical than astronomical, but sufficiently so to make it fit for offering to the Society. He illustrated his remarks by a model and diagram, showing that an observer, when he sees a planet and knows the earth's position, becomes aware of the direction of the line joining them, and the same is true at the other observations. He also knows that the planet is moving in an elliptical orbit, having the sun in one focus. He then considered the axis of the orbit instead of the plane, and by the figure deduced the required elements.

The Chairman enquired whether Mr. Airy had any elucidation of the practical application of this method to give the meeting.

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