Such are the laws of optics, such is the structure of your eyes, that, in the first place, the material heaven, the clouds, the moon, the sun, which is at so vast a distance from you; the planets, which in their apogee3 are still at a greater distance from it; all the stars placed at distances yet vastly greater, comets and meteors, everything, must appear to us in that vaulted roof as consisting of our atmosphere.
The sun appears to us, when in its zenith, smaller than when at fifteen degrees below; at thirty degrees below the zenith it will appear still larger than at fifteen; and finally, at the horizon, its size will seem larger yet; so that its dimensions in the lower heaven decrease in consequence of its elevations4, in the following proportions:
At the horizon 100
At fifteen degrees above 68
At thirty degrees 50
At forty-five degrees 40
Its apparent magnitudes in the vaulted roof are as its apparent elevations; and it is the same with the moon, and with a comet.
It is not habit, it is not the intervention6 of tracts7 of land, it is not the refraction of the atmosphere which produces this effect. Malebranche and Régis have disputed with each other on this subject; but Robert Smith has calculated.
Observe the two stars, which, being at a prodigious8 distance from each other, and at very different depths, in the immensity of space, are here considered as placed in the circle which the sun appears to traverse. You perceive them distant from each other in the great circle, but approximating to each other in every circle smaller, or within that described by the path of the sun.
It is in this manner that you see the material heaven. It is by these invariable laws of optics that you perceive the planets sometimes retrograde and sometimes stationary9; there is in fact nothing of the kind. Were you stationed in the sun, we should perceive all the planets and comets moving regularly round it in those elliptical orbits which God assigns. But we are upon the planet of the earth, in a corner of the universe, where it is impossible for us to enjoy the sight of everything.
Let us not then blame the errors of our senses, like Malebranche; the steady laws of nature originating in the immutable10 will of the Almighty11, and adapted to the structure of our organs, cannot be errors.
We can see only the appearances of things, and not things themselves. We are no more deceived when the sun, the work of the divinity — that star a million times larger than our earth — appears to us quite flat and two feet in width, than when, in a convex mirror, which is the work of our own hands, we see a man only a few inches high.
If the Chald?an magi were the first who employed the understanding which God bestowed12 upon them, to measure and arrange in their respective stations the heavenly bodies, other nations more gross and unintelligent made no advance towards imitating them.
These childish and savage13 populations imagined the earth to be flat, supported, I know not how, by its own weight in the air; the sun, moon, and stars to move continually upon a solid vaulted roof called a firmament14; and this roof to sustain waters, and have flood-gates at regular distances, through which these waters issued to moisten and fertilize15 the earth.
But how did the sun, the moon, and all the stars reappear after their setting? Of this they know nothing at all. The heaven touched the flat earth: and there were no means by which the sun, moon, and stars could turn under the earth, and go to rise in the east after having set in the west. It is true that these children of ignorance were right by chance in not entertaining the idea that the sun and fixed16 stars moved round the earth. But they were far from conceiving that the sun was immovable, and the earth with its satellite revolving17 round him in space together with the other planets. Their fables18 were more distant from the true system of the world than darkness from light.
They thought that the sun and stars returned by certain unknown roads after having refreshed themselves for their course at some spot, not precisely19 ascertained20, in the Mediterranean21 Sea. This was the amount of astronomy, even in the time of Homer, who is comparatively recent; for the Chald?ans kept their science to themselves, in order to obtain thereby22, greater respect from other nations. Homer says, more than once, that the sun plunges23 into the ocean — and this ocean, be it observed, is nothing but the Nile — here, by the freshness of the waters, he repairs during the night the fatigue24 and exhaustion25 of the day, after which, he goes to the place of his regular rising by ways unknown to mortals. This idea is very like that of Baron26 F?neste, who says, that the cause of our not seeing the sun when he goes back, is that he goes back by night.
As, at that time, the nations of Syria and the Greeks were somewhat acquainted with Asia and a small part of Europe, and had no notion of the countries which lie to the north of the Euxine Sea and to the south of the Nile, they laid it down as a certainty that the earth was a full third longer than it was wide; consequently the heaven, which touched the earth and embraced it, was also longer than it was wide. Hence came down to us degrees of longitude27 and latitude28, names which we have always retained, although with far more correct ideas than those which originally suggested them.
The Book of Job, composed by an ancient Arab who possessed29 some knowledge of astronomy, since he speaks of the constellations30, contains nevertheless the following passage: “Where wert thou, when I laid the foundation of the earth? Who hath taken the dimensions thereof? On what are its foundations fixed? Who hath laid the cornerstone thereof?”
The least informed schoolboy, at the present day, would tell him, in answer: “The earth has neither cornerstone nor foundation; and, as to its dimensions, we know them perfectly31 well, as from Magellan to Bougainville, various navigators have sailed round it.”
The same schoolboy would put to silence the pompous32 declaimer Lactantius, and all those who before and since his time have decided33 that the earth was fixed upon the water, and that there can be no heaven under the earth; and that, consequently, it is both ridiculous and impious to suppose the existence of antipodes.
It is curious to observe with what disdain34, with what contemptuous pity, Lactantius looks down upon all the philosophers, who, from about four hundred years before his time, had begun to be acquainted with the apparent revolutions of the sun and planets, with the roundness of the earth, and the liquid and yielding nature of the heaven through which the planets revolved35 in their orbits, etc. He inquires, “by what degrees philosophers attained36 such excess of folly37 as to conceive the earth to be a globe, and to surround that globe with heaven.” These reasonings are upon a par5 with those he has adduced on the subject of the sibyls.
Our young scholar would address some such language as this to all these consequential38 doctors: “You are to learn that there are no such things as solid heavens placed one over another, as you have been told; that there are no real circles in which the stars move on a pretended firmament; that the sun is the centre of our planetary world; and that the earth and the planets move round it in space, in orbits not circular but elliptical. You must learn that there is, in fact, neither above nor below, but that the planets and the comets tend all towards the sun, their common centre, and that the sun tends towards them, according to an eternal law of gravitation.”
Lactantius and his gabbling associates would be perfectly astonished, were the true system of the world thus unfolded to them.
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1 ordained | |
v.任命(某人)为牧师( ordain的过去式和过去分词 );授予(某人)圣职;(上帝、法律等)命令;判定 | |
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2 vaulted | |
adj.拱状的 | |
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3 apogee | |
n.远地点;极点;顶点 | |
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4 elevations | |
(水平或数量)提高( elevation的名词复数 ); 高地; 海拔; 提升 | |
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5 par | |
n.标准,票面价值,平均数量;adj.票面的,平常的,标准的 | |
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6 intervention | |
n.介入,干涉,干预 | |
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7 tracts | |
大片土地( tract的名词复数 ); 地带; (体内的)道; (尤指宣扬宗教、伦理或政治的)短文 | |
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8 prodigious | |
adj.惊人的,奇妙的;异常的;巨大的;庞大的 | |
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9 stationary | |
adj.固定的,静止不动的 | |
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10 immutable | |
adj.不可改变的,永恒的 | |
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11 almighty | |
adj.全能的,万能的;很大的,很强的 | |
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12 bestowed | |
赠给,授予( bestow的过去式和过去分词 ) | |
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13 savage | |
adj.野蛮的;凶恶的,残暴的;n.未开化的人 | |
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14 firmament | |
n.苍穹;最高层 | |
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15 fertilize | |
v.使受精,施肥于,使肥沃 | |
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16 fixed | |
adj.固定的,不变的,准备好的;(计算机)固定的 | |
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17 revolving | |
adj.旋转的,轮转式的;循环的v.(使)旋转( revolve的现在分词 );细想 | |
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18 fables | |
n.寓言( fable的名词复数 );神话,传说 | |
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19 precisely | |
adv.恰好,正好,精确地,细致地 | |
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20 ascertained | |
v.弄清,确定,查明( ascertain的过去式和过去分词 ) | |
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21 Mediterranean | |
adj.地中海的;地中海沿岸的 | |
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22 thereby | |
adv.因此,从而 | |
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23 plunges | |
n.跳进,投入vt.使投入,使插入,使陷入vi.投入,跳进,陷入v.颠簸( plunge的第三人称单数 );暴跌;骤降;突降 | |
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24 fatigue | |
n.疲劳,劳累 | |
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25 exhaustion | |
n.耗尽枯竭,疲惫,筋疲力尽,竭尽,详尽无遗的论述 | |
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26 baron | |
n.男爵;(商业界等)巨头,大王 | |
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27 longitude | |
n.经线,经度 | |
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28 latitude | |
n.纬度,行动或言论的自由(范围),(pl.)地区 | |
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29 possessed | |
adj.疯狂的;拥有的,占有的 | |
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30 constellations | |
n.星座( constellation的名词复数 );一群杰出人物;一系列(相关的想法、事物);一群(相关的人) | |
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31 perfectly | |
adv.完美地,无可非议地,彻底地 | |
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32 pompous | |
adj.傲慢的,自大的;夸大的;豪华的 | |
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33 decided | |
adj.决定了的,坚决的;明显的,明确的 | |
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34 disdain | |
n.鄙视,轻视;v.轻视,鄙视,不屑 | |
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35 revolved | |
v.(使)旋转( revolve的过去式和过去分词 );细想 | |
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36 attained | |
(通常经过努力)实现( attain的过去式和过去分词 ); 达到; 获得; 达到(某年龄、水平、状况) | |
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37 folly | |
n.愚笨,愚蠢,蠢事,蠢行,傻话 | |
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38 consequential | |
adj.作为结果的,间接的;重要的 | |
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