No astronomer, in showing how the movements of planets are due to gravity, thinks it necessary to say that the law of gravity was designed that the planets should pursue the courses which they pursue. I cannot believe that there is a bit more interference by the Creator in the construction of each species than in the course of the planets. It is only owing to Paley and Co., I believe, that this more special interference is thought necessary with living bodies. But we shall never agree, so do not trouble yourself to answer.英文原著 · 《More Letters of Charles Darwin Volume I》
"At the planet Mercury, the direct heat of the sun, or its power of causing heat, is six times greater than with us. If we suppose the mean temperature of Mercury to be the same as of the earth, and the planet to be surrounded with an atmosphere, denser than that of the earth, less capable of transmitting heat, or rather the influence of the sun to extricate heat, and at the same time more readily conducting it to keep up an evenness of temperature, may we not suppose the planet Mercury fit for the habitation of men, and the production of vegetables similar to our own?英文原著 · 《Thoughts on Man》
"We can hardly suppose the sun, a body three hundred times larger than all the planets together, was created only to preserve the periodic motions, and give light and heat to the planets. Many astronomers have thought that its atmosphere only is luminous, and its body opake, and probably of the same constitution as the planets. Allowing therefore that its luminous atmosphere only extricates heat, we see no reason why the sun itself should not be inhabited[75]."英文原著 · 《Thoughts on Man》
The motion of a satellite about its planet is one of revolution or rotation. When the satellite moves in an ellipse of any given degree of eccentricity, there is a certain amount of rotation in the system, technically called rotational momentum, and it is always the same at every part of the orbit. (Moment of momentum or rotational momentum is measured by the momentum of the satellite multiplied by the perpendicular from the planet on to the direction of the path of the satellite at any instant.)英文原著 · 《Darwin and Modern Science》
The simplest observations, however, show that the movements of the planets cannot be explained in this simple fashion. Here the geometrical genius of Ptolemy shone forth, and he devised a scheme by which the apparent wanderings of the planets could be accounted for without the introduction of aught save "perfect" movements.英文原著 · 《Great Astronomers》
In a precisely similar manner Ptolemy rendered an explanation of the fitful apparitions of Mercury. Now just on one side of the sun, and now just on the other, this rarely-seen planet moved like Venus on a circle whereof the centre was also carried by the line joining the sun and the earth. The circle, however, in which Mercury actually revolved had to be smaller than that of Venus, in order to account for the fact that Mercury lies always much closer to the sun than the better-known planet.英文原著 · 《Great Astronomers》
♪ Don't you touch my prickly muffin ♪ Did you ever notice that this music video takes place in a planetarium, and Sarah Lynn died in a planetarium?美剧 · 《Bojack Horseman》
I love you more than any person on the planet ever loved any other person on the planet.美剧 · 《The Good Doctor》
There are 1.7 million known species on the planet, and biologists estimate this represents only a quarter of the total species on the planet.美剧 · 《The News Room》
Couldn't you be like every other guy on the planet and just lead her on and not call her the next day?美剧 · 《2 Broke Girls》