|Genre(s)||Science fiction novel|
|Publisher||Foreign Languages Publishing House|
|Published in English||1950|
|Media type||Print (Hardcover)|
Plot summary 
The story begins in the Soviet Union, just after the end of the Russian Civil War. A lonely engineer, Mstislav Los', designs and constructs a revolutionary pulse detonation rocket and decides to set course for Mars. Looking for a companion for the travel, he finally leaves Earth with a retired soldier, Alexei Gusev.
Arriving on Mars, they discover that the planet is inhabited by an advanced civilization. However, the gap between the ruling class and the workers is very strong and reminiscent of the early capitalism, with workers living in underground corridors near their machines.
Later in the novel, it is explained that Martians are descendants of both local races and of Atlanteans who came there after the sinking of their home continent. Mars is now ruled by Engineers but all is not well. While speaking before an assembly, their leader, Toscoob, says that the city must be destroyed to ease the fall of Mars. Aelita, Toscoob's beautiful daughter and the princess of Mars, later reveals to Los' that the planet is dying, that the polar ice caps are not melting as they once did and the planet is facing an environmental catastrophe.
While the adventurous Gusev takes the lead of a popular uprising against the ruler the more intellectual Los' becomes enamored with Aelita. When the rebellion is crushed, they are forced to flee Mars and eventually make it back to Earth. The trip is prolonged with the effects of high speed and time dilation resulting in a loss of over three years and the exact fate of Aelita herself is unknown. It is hinted that she actually survived because Los' receives radio messages from Mars mentioning his name.
English releases 
- Tolstoy, Aleksey Nikolayevich. Aelita translated by Lucy Flaxman. Moscow: Foreign Languages Publishing House, 1950, 276 pp. LCCN 5903-7312.
- Tolstoy, Alexei N. Aelita translated by Antonina W. Bouis; introduction by Theodore Sturgeon. New York: Macmillan, 1981, 167 pp. ISBN 978-0-02-619200-2. LCCN 8100-2185.
- Tolstoi, Alexei. Aelita or The Decline of Mars new translation by Leland Fetzer. Ann Arbor: Ardis, August, 1985, 176 pp. ISBN 978-0-88233-788-3. LCCN 8500-7437.
- Tolstoy, Alexei (2001). Aelita. Amsterdam, The Netherlands: Fredonia Books. ISBN 978-1-58963-374-2.
See also 
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