On the lateral surface of the human brain, the central sulcus separates the frontal lobe from the parietal lobe. The lateral sulcus separates the frontal lobe from the temporal lobe. The frontal lobe bottom can be divided into a lateral, polar, orbital (above the orbit; also called basal or ventral), and medial part.
The age of an individual star can vary; they were all made at different times and have different life spans. Stars can range from a few million to a several billion years old. The oldest star yet discovered, HE 1523-0901, is an estimated 13.2 billion years old.
The life span of the sun is 10 - 12 billion years and it is now 4.6 billion years old which makes the sun middle aged. The size of the star is not as important as to the â¦ class of the star. A star like the sun which is a Gv2 class, yellow dwarf has a life span of about 10 billion years.