ASTRO 102 Chapter 2: Discover the Universe for Yourself
14 Feb 2019
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Chapter 2 - discover the universe for yourself. Constellations - a region of the sky with well-defined borders; the familiar patterns of stars merely help us locate the constellations. The concept that the objects in the sky all travel on a theoretical sphere of a sky, the celestial sphere that surrounds earth. North celestial pole - the point directly over earth"s north pole. South celestial pole - the point directly over earth"s south pole. Celestial equator - the projection of earth"s equator into space, makes a complete circle around the celestial sphere. Local sky - the sky as seen from wherever you happen to be standing. The milky way in the night sky traces our galaxy"s disk of stars -- the galactic plane -- as it appears from our location with the milky way galaxy. Horizon - the boundary between earth and sky.
