Kepler’s first law states that Definition The orbit of every planet is an ellipse with the Sun at one of the two foci. An ellipse is a closed plane curve that resembles a stretched out circle. Note that the Sun is not at the center of the ellipse, but at one of its foci. The other focal point, f2, has no physical significance for the orbit.

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Named by ancient Greeks after the mythological Andromeda princess, the constellation contains the Andromeda Galaxy, the nearest full-fledged galaxy to our own Milky Way. Andromeda is one.

/ ( ˈɑːtɪˌfækt) / noun something made or given shape by man, such as a tool or a work of art, esp an object of archaeological interest anything man-made, such as a spurious experimental result cytology a structure seen in tissue after death, fixation, staining, etc, that is not normally present in the living tissue Word Origin for artefact