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"Real science opens windows for us to look through. We're right at the footsteps of the most interesting scientists around."
- Larry Niven

Trip to Mars  
  A voyage across space to the planet Mars.  

One of the earliest descriptions of a trip to Mars in science fiction.

I had determined that my first attempt should be a visit to Mars. The Moon is a far less interesting body, since, on the hemisphere turned towards the Earth, the absence of an atmosphere and of water ensures the absence of any such life as is known to us—probably of any life that could be discerned by our senses—and would prevent landing; while nearly all the soundest astronomers agree in believing, on apparently sufficient grounds, that even the opposite hemisphere [of which small portions are from time to time rendered visible by the libration, though greatly foreshortened and consequently somewhat imperfectly seen] is equally devoid of the two primary necessaries of animal and vegetable life. That Mars has seas, clouds, and an atmosphere was generally admitted, and I held it to be beyond question. Of Venus, owing to her extraordinary brilliancy, to the fact that when nearest to the Earth a very small portion of her lighted surface is visible to us, and above all to her dense cloud-envelope, very little was known; and though I cherished the intention to visit her even more earnestly than my resolve to reach the probably less attractive planet Mars, I determined to begin with that voyage of which the conditions and the probable result were most obvious and certain. I preferred, moreover, in the first instance, to employ the apergy as a propelling rather than as a resisting force. Now, after passing beyond the immediate sphere of the Earth's attraction, it is plain that in going towards Mars I should be departing from the Sun, relying upon the apergy to overcome his attraction; whereas in seeking to attain Venus I should be approaching the Sun, relying for my main motive power upon that tremendous attraction, and employing the apergy only to moderate the rate of movement and control its direction. The latter appeared to me the more delicate, difficult, and perhaps dangerous task of the two; and I resolved to defer it until after I had acquired some practical experience and dexterity in the control of my machinery.

It was expedient, of course, to make my vessel as light as possible, and, at the same time, as large as considerations of weight would admit. But it was of paramount importance to have walls of great thickness, in order to prevent the penetration of the outer cold of space, or rather the outward passage into that intense cold of the heat generated within the vessel itself, as well as to resist the tremendous outward pressure of the air inside. Partly for these reasons, and partly because its electric character makes it especially capable of being rendered at will pervious or impervious to the apergic current, I resolved to make the outer and inner walls of an alloy of …, while the space between should be filled up with a mass of concrete or cement, in its nature less penetrable to heat than any other substance which Nature has furnished or the wit of man constructed from her materials.

Briefly, having determined to take advantage of the approaching opposition of Mars in MDCCCXX … [3], I had my vessel constructed with walls three feet thick, of which the outer six and the inner three inches were formed of the metalloid. In shape my Astronaut somewhat resembled the form of an antique Dutch East-Indiaman, being widest and longest in a plane equidistant from floor and ceiling, the sides and ends sloping outwards from the floor and again inwards towards the roof. The deck and keel, however, were absolutely flat, and each one hundred feet in length and fifty in breadth, the height of the vessel being about twenty feet. In the centre of the floor and in that of the roof respectively I placed a large lens of crystal, intended to act as a window in the first instance, the lower to admit the rays of the Sun, while through the upper I should discern the star towards which I was steering. The floor, being much heavier than the rest of the vessel, would naturally be turned downwards; that is, during the greater part of the voyage towards the Sun. I placed a similar lens in the centre of each of the four sides, with two plane windows of the same material, one in the upper, the other in the lower half of the wall, to enable me to discern any object in whatever direction. The crystal in question consisted of …, which, as those who manufactured it for me are aware, admits of being cast with a perfection and equality of structure throughout unattainable with ordinary glass, and wrought to a certainty and accuracy of curvature which the most patient and laborious polishing can hardly give to the lenses even of moderate-sized telescopes, whether made of glass or metal, and is singularly impervious to heat. I had so calculated the curvature that several eye-pieces of different magnifying powers which I carried with me might be adapted equally to any of the window lenses, and throw a perfect image, magnified by 100, 1000, or 5000, upon mirrors properly placed.

I carpeted the floor with several alternate layers of cork and cloth. At one end I placed my couch, table, bookshelves, and other necessary furniture, with all the stores needed for my voyage, and with a further weight sufficient to preserve equilibrium. At the other I made a garden with soil three feet deep and five feet in width, divided into two parts so as to permit access to the windows. I filled each garden closely with shrubs and flowering plants of the greatest possible variety, partly to absorb animal waste, partly in the hope of naturalising them elsewhere. Covering both with wire netting extending from the roof to the floor, I filled the cages thus formed with a variety of birds. In the centre of the vessel was the machinery, occupying altogether a space of about thirty feet by twenty. The larger portion of this area was, of course, taken up by the generator, above which was the receptacle of the apergy. From this descended right through the floor a conducting bar in an antapergic sheath, so divided that without separating it from the upper portion the lower might revolve in any direction through an angle of twenty minutes (20'). This, of course, was intended to direct the stream of the repulsive force against the Sun. The angle might have been extended to thirty minutes, but that I deemed it inexpedient to rely upon a force, directed against the outer portions of the Sun's disc, believing that these are occupied by matter of density so small that it might afford no sufficient base, so to speak, for the repulsive action. It was obviously necessary also to repel or counteract the attraction of any body which might come near me during the voyage. Again, in getting free from the Earth's influence, I must be able to steer in any direction and at any angle to the surface. For this purpose I placed five smaller bars, passing through the roof and four sides, connected, like the main conductor, with the receptacle or apergion, but so that they could revolve through a much larger angle, and could at any moment be detached and insulated. My steering apparatus consisted of a table in which were three large circles. The midmost and left hand of these were occupied by accurately polished plane mirrors. The central circle, or metacompass, was divided by three hundred and sixty fine lines, radiating from the centre to the circumference, marking as many different directions, each deviating by one degree of arc from the next. This mirror was to receive through the lens in the roof the image of the star towards which I was steering. While this remained stationary in the centre all was well. When it moved along any one of the lines, the vessel was obviously deviating from her course in the opposite direction; and, to recover the right course, the repellent force must be caused to drive her in the direction in which the image had moved. To accomplish this, a helm was attached to the lower division of the main conductor, by which the latter could be made to move at will in any direction within the limit of its rotation. Controlling this helm was, in the open or steering circle on the right hand, a small knob to be moved exactly parallel to the deviation of the star in the mirror of the metacompass. The left-hand circle, or discometer, was divided by nineteen hundred and twenty concentric circles, equidistant from each other. The outermost, about twice as far from the centre as from the external edge of the mirror, was exactly equal to the Sun's circumference when presenting the largest disc he ever shows to an observer on Earth. Each inner circle corresponded to a diameter reduced by one second. By means of a vernier or eye-piece, the diameter of the Sun could be read off the discometer, and from his diameter my distance could be accurately calculated. On the further side of the machinery was a chamber for the decomposition of the carbonic acid, through which the air was driven by a fan. This fan itself was worked by a horizontal wheel with two projecting squares of antapergic metal, against each of which, as it reached a certain point, a very small stream of repulsive force was directed from the apergion, keeping the wheel in constant and rapid motion. I had, of course, supplied myself with an ample store of compressed vegetables, preserved meats, milk, tea, coffee, &c., and a supply of water sufficient to last for double the period which the voyage was expected to occupy; also a well-furnished tool-chest (with wires, tubes, &c.). One of the lower windows was made just large enough to admit my person, and after entering I had to close it and fix it in its place firmly with cement, which, when I wished to quit the vessel, would have again to be removed.

Technovelgy from Across the Zodiac, by Percy Greg.
Published by Trubner & Co. in 1880
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  More Ideas and Technology from Across the Zodiac
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  Tech news articles related to Across the Zodiac
  Tech news articles related to works by Percy Greg

Trip to Mars-related news articles:
  - First Trips To Mars Announced By Elon Musk

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