Australia's latitude is south and its longitude is east. This is because Australia is located below the equator in the southern hemisphere and to the east of the Prime Meridia â¦ n in the eastern hemisphere.
A star is born when atoms of light elements are squeezed under enough pressure for their nuclei to undergo fusion. All stars are the result of a balance of forces: the force of gravity compresses atoms in interstellar gas until the fusion reactions begin.
Simply stated, star formation begins when part of the interstellar mediumâone of the cold, dark clouds discussed in Chapter 18âstarts to collapse under its own weight. (Sec. 18.3) The cloud fragment heats up as it shrinks, and eventually its center becomes hot enough for nuclear burning to begin.