Latitude latitude, to avoid ambiguity with the geodetic latitude and the auxiliary latitudes defined in subsequent sections of this article. Besides the equator, four other parallels are of significance: The plane of the Earth's orbit about the Sun is called the ecliptic, and the plane perpendicular to the rotation axis of the Earth is the equatorial plane. The angle between the ecliptic and the equatorial plane is called variously the axial tilt, the obliquity, or the inclination of the ecliptic, and it is conventionally denoted by . The latitude of the tropical circles is equal to and the latitude of the
The Longest Voyage it is "nearly unmatched" in science fiction for its "lyricism, compassion, subtlety, thoughtfulness, and above all the relish it takes in the bristling strangeness and wonder of the world". Steven H. Silver commented that what distinguishes "The Longest Voyage" from similar stories is that "Anderson provides strong motivation for both the explorers and the natives". The Longest Voyage "The Longest Voyage" is a science fiction short story by American writer Poul Anderson. It won the Hugo Award for Best Short Story in 1961. On a distant world the age of exploration is beginning. A party of daring explorers attempts to