It consists of a papule from which the contents are not easily expressed. When inflamed these lesions form pustules and nodules. The open form of comedo, called a blackhead, is rarely inflamed. It has a dilated opening from which the oily debris is easily expressed.
The Tropic of Capricorn is the circle marking the latitude 23.5 degrees south where the sun is directly overhead at noon on December 21, the beginning of winter in the northern hemisphere.
The Tropic of Capricorn is at just under 23.5 degrees south latitude. There are 90 degrees of latitude from the equator to the pole, which is one quarter of the earth's circumference.Since the earth's circumference is about 25,000 miles, one quarter of it is about 6,250 miles.The distance from the equator to the tropic is therefore approximately 6,250x23.5/90 = 1,630 miles (2,630 km).The distance from the equator to the Tropic of Cancer, at 23.5 degrees north latitude, is the same.ince the earth's circumference is about 25,000 miles, one quarter of it is about 6,250 miles. The distance from the equator to the tropic is therefore approximately 6,250x23.5/90 = 1,630 miles (2,630 km). The distance from the equator to the Tropic of Cancer, at 23.5 degrees north latitude, is the same.