The ecliptic and the equator
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Some sky watchers may catch Jupiter and Mercury very close this week as the morning planet lineup continues. Uranus remains in the evening sky. The week begins with the solstice and Venus at greatest elongation.
\\nJust like latitude and longitude lines on an earth map, there are lines showing where to plot points to represent starts, planets, and other object on a sky map. Find out about the two coordinate systems.
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