From Early Writings, starting at the bottom of page 15:

"... Soon our eyes were drawn to the east, for a small black cloud had appeared, about half as large as a man's hand, which we all knew was the sign of the Son of man. We all in solemn silence gazed on the cloud as it drew nearer and became lighter, glorious, and still more glorious, till it was a great white cloud. The bottom appeared like fire; a rainbow was over the cloud, while around it were ten thousand angels, singing a most lovely song; and upon it sat the Son of man. His hair was white and curly and lay on His shoulders; and upon His head were many crowns. His feet had the appearance of fire; in His right hand was a sharp sickle; in His left, a silver trumpet. His eyes were as flame of fire, which searched His children through and through. Then all faces gathered paleness, and those that God had rejected gathered blackness. Then we all cried out, "Who shall be able to stand? Is my robe spotless?" Then the angels ceased to sing, and there was some time of awful silence, when Jesus spoke: "Those who have clean hands and pure hearts shall be able to stand; My grace is sufficient for you." At this our faces lighted up, and joy filled every heart. And the angels struck a note higher and sang again, while the clouds drew still nearer the earth.

"The Jesus's silver trumpet sounded, as He descended on the cloud, wrapped in flames of fire. He gazed on the graves of the sleeping saints, then raised His eyes and hands to heaven, and cried, "Awake! awake! awake! ye that sleep in the dust, and arise." Then there was a mighty earthquake. The graves opened, and the dead came up clothed with immortality. The 144,000 shouted, "Alleluia!" as they recognized their friends who had been torn from them by death, and in the same moment we were changed and caught up together with them to meet the Lord in the air.

"We all entered the cloud together, and were seven days ascending to the sea of glass, when Jesus brought the crowns, and with His own right hand plced them on our heads. He gave us harps of gold and palms of victory. Here on the sea of glass the 144,000 stood in a perfect square. Some of them had very bright crowns, others not so bright. Some crowns appeared heavey with stars, while others had but few. All were perfectly satisfied with their crowns. And they were all clothed with a glorious white mantle from their shoulders to their feet. Angels were all about us as we marched over the sea of glass to the gate of the city. Jesus raised His mighty, glorious arm, laid hold of the pearly gate, swung it back on its glittering hingesm abdsaid to us, "you have washed your robes in my blood, stood stiffly for My truth, enter in." We all marched in and felt that we had a perfect right in the city.

"Here we saw the tree of life and the throne of God. Out of the throne came a pure river of water, and on either side of the river was the tree of life. On one side of the river was a trunk of a tree, and a trunk on the other side of the river, both of pure, transparent gold. At first I thought I saw two trees. I looked again, and saw that they were united at the top in one tree. So it was the tree of life on either side of the river of life. Its branches bowed to the place where we stood, and the fruit was glorious; it looked like gold mixed with silver.

"We all went under the tree and sat down to look at the glory of the place, when Brethren Fitch and Stockman (two ministers Ellen knew, who died before the 1844 disappointment), who had preached the gospel of the kingdom, and whom God laid in the grave to save them, came up to us and asked us what we had passed through while they were sleeping. We tried to call up our greatest trials, but they looked so small compared with the far more exceeding and eternal weight of glory that surrounded us that we could not speak them out, and we all cried out, "Alleluia, heaven is cheap enough!" and we touched our glorious harps and made heaven's arches ring.

"With Jesus at our head we all descended from the city down to this earth, on a great and mighty mountain, which could not bear Jesus up, and it parted asunder, and there was a mighty plain. Then we looked up and saw the great city, with twelve foundations, and twleve gates, three on each side, and an angel at each gate. We all cried out, "The city, the great city, it's coming, it's coming down from God out of heaven," and it came and settled on the place where we stood. Then we began to look at the glorious things outside of the city. There I saw most glorious houses, that had the appearance of silver, supported by four pillars set with pearls most glorious to behold. There were to be inhabited by the saints. In each was a golden shelf. I saw many of the saints go into houses, take off their glittering crowns and lay them on the shelf, then go out into the field by the houses to do something with the earth; not as we have to do with the earth here; no, no. A glorious light shone all about their heads, and they were continually shouting and offering praises to God.

"I saw another field full of all kinds of flowers, and as I plucked them, I cried out, "They will never fade." Next I saw a field of tall grass, most glorious to behold; it was living green and had a reflection of silver and gold, as it waved proudly to the glory of King Jesus. Then we entered a field full of all kinds of beasts -- the lion, the lamb, the leopard, and the wolf, all together in perfect union. We passed through the midst of them, and they followed peaceable after. Then we entered a wood, not like the dark woods we have here; no, no; but light, and all over glorious; the branches of the trees waved to and fro, and we all cried out, "We will dwell safely in the wilderness and sleep in the woods." We passed through the woods, for we were on our way to Mount Zion.

"As we were traveling along, we met a company who also were gazing at the glories of the place. I noticed red as a borrder on their garments; their crowns were brilliant; their robes were pure white. As we greeted them, I asked Jesus who they were. He said they were martyrs that had been slain for Him. With them was an innumerable company of little ones; they also had a hem of red on their garments. Mount Zion was just before us, and on the mount was a glorious temple, and about it were seven other mountains, on which grew roses and lilies. And I saw the little ones climb, or, if they chose, use their little wings and fly, to the top of the mountains and pluck the never-fading flowers. There were all kinds of trees around the temple to beautify the place: the box, the pine, the fir, the oil, the myrtle, the pomegranate, and the fig tree bowed down with the weight of its timely figs -- these made the place all over glorious. As we were about to enter the holy temple, Jesus raised His lovely voice and said, "Only the 144,000 enter this place," and we shouted, "Alleluia."

"This temple was supported by seven pillars, all of transparent gold, set in pearls most glorious. The wonderful things I saw there I cannot describe. Oh that I could talk in the language of Canaan, then could I tell a little of the glory of the better world. I saw there tables of stone in which the names of the 144,000 were engraved in letters of gold. After we beheld the glory of the temple, we went out, and Jesus left us and went into the city. Soon we heard His lovely voice again, saying, "Come, my people, you have come out of great tribulation, and done My will; suffered for Me; come in to supper, for I will gird Myself, and serve you." We shouted, "Alleluia! glory!" and entered into the city. And I saw a table of pure silver; it was many miles in length, yet our eyes could extend over it. I saw the fruit of the tree of life, the manna, almonds, figs, pomegranates, grapes, and many other kinds of fruit. I asked Jesus to let me eat of the fruit. He said, "Now now. Those who eat o the fruit of this land go back to earth no more. But in a little while, if faithful, you shall both eat of the fruit of the tree of life and drink of the water of the fountain." And He said, "You must go back to earth again and relate to others what I have revealed to you." Then an angel bore me gently down to this dark world. Sometimes I think I can stay here no longer; all things of earth look so dreary. I feel very lonely here, for I have seen a better land. Oh, that I had wings like a dove, then would I fly away and be at rest!"

Here we get a better picture, in language closer to our time, of what heaven is like. The land scape, the personality of the animals, the fact that there are animals and children in heaven, there are rewards. There is music, art, study, food, all kinds of things that we enjoy here on earth but without the limitations that we currently face.

Again, more clarification is given -- and when we check it against the Bible, it fits:

"December 16, 1848, the Lord gave me a view of the shaking of the powers of the heavens. I saw that when the Lord said "heaven," in giving the signs recorded by Matthew, Mark, and Luke, he meant heaven, and when He said "earth" he meant earth. The powers of heaven are the sun, moon, and stars. They rule the heavens. The powers of the earth are those that rule on the earth. The powers of heaven will be shaken at the voice of God. The sun, moon, and stars will be moved out of their places. They will not pass away, but be shaken by the voice of God.

"Dark heavy clouds came up and clashed against each other. The atmosphere parted and rolled back; then we could look up through the open space in Orion, whence came the voice of God. The Holy City will come down through that open space. I saw that the powers of earth are now being shaken and that events come in order. War, and rumors of war, sword, famine, and pestilence are first to shake the powers of earth, then the voice of God will shake the sun, moon, and stars, and this earth also. I saw that the shaking of the powers in Europe is not, as some teach, the shaking of the powers of heaven, but is the shaking of the angry nations."

Even here we see that where before we were told the great city came down from the sky, Ellen White recognized the constellation and names it for us.

Whether the shaken heavens is really a displacement, or if it is merely a visual rift caused by dimensional shift causing interference patterns on our space time continium, we don't know. We aren't told the matter of the mechanics because the message of why/when/what-to-do are more important than how. The how will be explained to us after the fact.

The selections presented here don't even scratch the surface of the message of Ellen White, but they do serve to add interesting reading which makes following the Bible easier for those who get lost.