Who can tell us of the inhabitants of this little planet that shines of an evening, called the moon? When we view its face we may see what is termed "the man in the moon," and what some philosophers declare are the shadows of mountains. But these sayings are very vague, and amount to nothing; and when you inquire about the inhabitants of that sphere you find that the most learned are as ignorant in regard to them as the most ignorant of their fellows. So it is with regard to the inhabitants of the sun. Do you think it is inhabited? I rather think it is. Do you think there is any life there? No question of it; it was not made in vain. It was made to give light to those who dwell upon it, and to other planets; and so will this earth when it is celestialized. Every planet in its first rude, organic state receives not the glory of God upon it, but is opaque; but when celestialized, every planet that God brings into existence is a body of light, but not till then. Christ is the light of this planet. - Journal of Discourses 13:271 (July 24, 1870)In my humble opinion, that prophesy was so good, it needed a little more highlighting.
And while we are on the general topic of Celestial Wisdom revealed by the god of Mormonism to LDS Prophet Brigham Young, who can forget these immortal classics:
Rock will decay; Gold and silver grow, same as hair
The elements of which this terra firma is composed, are every moment either composing or decomposing. They commence to organize or to compose, and continue to grow until they arrive at their zenith of perfection, and then they begin to decompose. When you find a rock that has arrived at its greatest perfection, you may know that the work of decaying has begun. Let the practical chemist make his observations upon a portion of the matter of which this earth is composed; and he will find, that just as quick as it is at its perfection, that very instant it begins to decompose. ... Gold and silver grow, and so does every other kind of metal, the same as the hair upon my head, or the wheat in the field; they do not grow as fast, but they are all the time composing or decomposing. - Journal of Discourses 1:219 (October 9, 1852)
Whites will never be allowed to marry blacks
Shall I tell you the law of God in regard to the African race? If the while man who belongs to the chosen seed mixes his blood with the seed of Cain, the penalty, under the law of God, is death on the spot. This will always be so. - Journal of Discourses: vol.10 p. 110 (March 8, 1863)
You can see an annotated listing of several dozen more equally stupid prophetic utterances and insane teachings from the LDS Prophet (and Mormon university namesake) HERE.
You forgot to add this particular disclaimer to the sermons of Brigham Young you just posted.
I have never yet preached a sermon and sent it out to the children of men, that they may not call Scripture. Let me have the privilege of correcting a sermon, and it is as good Scripture as they deserve. The people have the oracles of God continually. (Brigham Young, Journal of Discourses, Volume 13, Page 95)