Page Content (OCR)
half; so that the squares of their periodical times are very near in the same proportion with the cubes of their distance from the centre of Mars, which evidently shows them to be governed by the same law of gravitation, that influences the other heavenly bodies.' Undoubtedly the Martian satellites were suspected by some astronomers before Swift, but suspicions are not nearly enough for such precise data. We do not know where Swift got his knowledge from. Actually these satellites are the smallest and strangest moons in our solar system. They rotate in almost circular orbits above the equator. If they reflect the same amount of light as our moon, then Phobos must have a diameter of 10 miles and Demos one of only 5 miles. But if they are artificial moons and so reflect still more light, they would actually be even smaller. They are the only known moons in our solar system drat move round their mother planet faster than she herself rotates. In relation to the rotation of Mars Phobos completes two orbits in one Martian day, whereas Deimos moves only a little faster round Mars than the planet itself rotates. In 1862, when the earth was in a very favourable position in relation to Mars, people sought in vain for the Martian satellites—they were not discovered until fifteen years later | The theory of planetoids came up because several astronomers suspected that the Martian moons were fragments from space which Mars had attracted. But the theory of planetoids is untenable, for both the Martian moons revolve in almost the same planes above the equator. One fragment from space might do that by chance, but not two. Finally, measurable facts produced trie modern satellite theory. The renowned American astronomer Carl Sagan and the Russian scientist Shlovsky in their book Intelligent Life in the Universe, published in 1966, accept that the moon Phobos is an artificial satellite. As the result of a series of measurements Sagan came to the conclusion that Phobos must be In fact, the peculiarities of Phobos's orbit bear no relation to its apparent mass, whereas such orbits are typical in the case of hollow bodies. The Russian Shlovsky, Director of the Department of Radio- Astronomy in the Moscow Sternberg Institute, made the same statement after he had observed that a peculiar unnatural acceleration could be confirmed in the movement of the Martian moon Phobos. This acceleration is identical with the phenomenon which has been established in the case of our own Today people take these fantastic theories of Sagan and Shlovsky very seriously. The Americans plan further Martian probes, which are also intended to take the bearings of the Martian moons. In the years ahead, the Russians intend to observe the movements of the Martian moons from several observatories. If the view supported by reputable scientists in east and west that Mars once had an advanced civilisation is correct, the question arises why does it no longer exist today? Did the intelligences on Mars have to seek a new environment? Did their home planet, which was losing more and more oxygen, force them to look for new territories to settle? Was a cosmic catastrophe responsible for the downfall of the civilisation? Lastly, were some of the inhabitants of Mars able to escape to a How could Swift describe the Martian satellites when they were not discovered until 150 years later? hollow and a hollow moon cannot be natural. artificial satellites.