Who and when discovered the satellites of Mars? Detailed answer

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Who and when discovered the satellites of Mars? Detailed answer

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Who and when discovered the satellites of Mars?

The moons of Mars (Phobos and Deimos) were first discovered by the American astronomer Asaph Hall (1829-1907) in 1877.

The most striking thing, however, is that the presence of two satellites on Mars was predicted back in the middle of the 1667th century by the English writer Jonathan Swift (1745-1694) and the French philosopher Voltaire (1778-XNUMX). Speaking in the famous "Gulliver's Travels" about the achievements of the Laputians in the field of astronomy, Swift reports that "they discovered two small stars or two satellites orbiting Mars." In this regard, the names of Swift and Voltaire are assigned to two craters on Deimos.

Less well known, but no less interesting is the fact that in the Georgian epic, dating back to the middle of the 50th century, one of the parameters of Deimos' orbit is indicated very accurately (much more accurately than in Gulliver's Travels): "In the sky of this star (Mars) is another star, whose orbit is 280 eji", which, when translated into modern units of length, is about 150 thousand kilometers (1 eji is equal to about 3 kilometers). The length of the orbit of Deimos, according to modern data, is 147 kilometers.

Author: Kondrashov A.P.

Random interesting fact from the Great Encyclopedia:

What do we not see in the sky?

"Black holes". They absorb light. Such a hole in the Magellanic Cloud, with a diameter of only 6 km, has the mass of ten of our Suns! There are also supermassive "black holes" a couple of kilometers in size and a hundred solar masses.

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