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 Blood Line anything in the way that, say, some of the sacrifices in "Children of Earth" did.' He also criticised the effect of the cliffhanger, saying 'so it turns out that this huge world-changing event was just a "trial run" for an even bigger plan on the part of the bad guys? Does anyone (other than Davies) think that what the series needs is to get even bigger?' The Blood Line "The Blood Line" is the tenth and final episode of "", the fourth series of the British science fiction television series "Torchwood". It was first broadcast in the United States on