<span>Divides are the boundaries called that separate streams in adjacent drainage.</span>
Tropic of Cancer, latitude approximately 23°27′ N of the terrestrial Equator. This latitude corresponds to the northernmost declination of the Sun’s ecliptic to the celestial equator. At the summer solstice (in the Northern Hemisphere), around June 21, the Sun attains its greatest declination north and is directly over the Tropic of Cancer. At that time the Sun appears in the constellation Gemini, but much earlier in history, it lay in the constellation Cancer, thereby resulting in the designation Tropic of Cancer. Because of the gradual change in the direction of Earth’s axis of rotation, the Sun will reappear in the constellation of Cancer in approximately 24,000 years.
Earth is closest to the sun at a point called perigee.
The point at which the Earth is farthest from the sun is called the apogee, just in case you needed to know that one too.
Kepler's first law means that planets move around the Sun in elliptical orbits.
