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单词 geocentric parallax
释义 geocentric parallax
[¦jē·ō¦sen·trik `par·ǝ´laks]
ASTRONOMY
The difference in the apparent direction or position of a celestial body, measured in seconds of arc, as determined from the center of the earth and from a point on its surface; this varies with the body's altitude and distance from the earth. Also known as diurnal parallax.
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