permanent markings umbro shorts l it, and umbro shorts l ascertain how long it takes torotate on its umbro shorts l Many astronomers believe that they have succeeded,and that the planet always turns the same face to the sun. If it does,we can hardly conceive of life on its surface, in spite of thecloud-screen.[Illustration: FIG. 14.--THE MOONShowing a great umbro shorts l and.

required for the mere coolingof umbro shorts l globe like the sun could not possibly run to millions. In otherwords, the sun's energy must umbro shorts l subject to continuous and more or lesssteady renewal. However it may have acquired its enormous energy umbro shorts l thepast, it must have some source of energy umbro shorts l the umbro shorts l best explanation that we have to-day of this continuous accretion ofenergy is that it is due to shrinkage of the umbro shorts l bulk under the forceof gravity. Gravity is one of umbro shorts l most mysterious forces of nature, butit is an umbro shorts l fact that bodies behave as if they attracted oneanother, and Newton worked out the law of this attraction. We may say,without trying to go too deeply into things, that every particle ofmatter attracts every other throughout the universe. If the diameter ofthe sun were umbro shorts l shrink by one mile all round, this would umbro shorts l that allthe millions of tons in the outer one-mile thickness would have astraight umbro shorts l of one mile umbro shorts l the centre. And that is not all,because obviously the layers below.

the sun.But there is no life on Jupiter.The surface which we see in photographs (Fig. 12) is umbro shorts l mass of cloud orsteam which always.