Stars
The internal heating within stars are so great that they sustain thermonuclear reaction of hydrogen to helium and can make heavier elements. The Sun for example has a core temperature of 13,600,000 K. The bluer, more massive, hotter, and older the stars are, the more internal heating it has. During the end of its lifecycle, the internal heating of a star increases dramatically, caused by contracting core, eventually becoming hot enough to fuse helium then carbon or oxygen.
Read more about this topic: Internal Heating
Famous quotes containing the word stars:
“the gray filth of it:
the knowledge that humankind,
delicate Man, whose flesh
responds to a caress, whose eyes
are flowers that perceive the stars ...”
—Denise Levertov (b. 1923)
“Young men of the fairest promise, who begin life upon our shores, inflated by the mountain winds, shined upon by all the stars of God, find the earth below not in unison with these,—but are hindered from action by the disgust which the principles on which business is managed inspire, and turn drudges, or die of disgust,—some of them suicides.”
—Ralph Waldo Emerson (1803–1882)
“Truly the stars were given for a consolation to man.”
—Henry David Thoreau (1817–1862)