Page:Across the Zodiac (Volume 1).djvu/78

many intricate calculations, was that the distance of 95 millions of miles between the Earth and the Sun, accepted, though not very confidently, by all terrestrial astronomers, is an over-estimate; and that, consequently, all the other distances of the solar system have been equally overrated. Mars consequently would be smaller, but also his distance considerably less, than I had supposed. I finally concluded that the solar distance of the Earth was less than 92 millions of miles, instead of more than 95. This would involve, of course, a proportionate diminution in the distance I had to traverse, while it did not imply an equal error in the reckoning of my speed, which had at first been calculated from the Earth's disc, and not from that of the Sun. Hence, continuing my course unchanged, I should arrive at the orbit of Mars some days earlier than intended, and at a point behind that occupied by the planet, and yet farther behind the one I aimed at. Prolonged observation and careful calculation had so fully satisfied me of the necessity of the corrections in question, that I did not hesitate to alter my course accordingly, and to prepare for a descent on the thirty-ninth instead of the forty-first day. I had, of course, to prepare for the descent very long before I should come within the direct influence of the attraction of Mars. This would not prevail over the Sun's attraction till I had come within a little more than 100,000 miles of the surface, and this distance would not allow for material reduction of my speed, even were I at once to direct the whole force of the apergic current against the planet. I estimated that arriving within some two millions of miles of him, with a speed of 45,000 miles per hour, and then direct-