- He is the father of the rocket science. Started the work that made progress possible for Hermann Oberth, Robert H. Goddard and Sergei P. Korolev.
- Related to Sarah Ziolkowski.
- The crater named after Konstantin Tsiolkovsky on the backside of the moon was mentioned in the movie Apollo 13 (1995). The original Apollo 13 was the first to take a picture of the Tsiolkovsky crater.
- On January 21, 1922, Tsiolkovskiy's daughter Anna died of tuberculosis.
- In 1965, the Tsiolkovskiy dome on the Princess Martha Coast in Antarctica was named in his honor.
- Tsiolkovskiy published 148 works during his life (mostly articles and small brochures), more than 600 unpublished manuscripts have been preserved in the archive.
- Around the beginning of 1867, Konstantin caught a bad cold while sledding in the winter, the disease turned into severe scarlet fever and, due to complications, he was almost completely deaf.
- In 1954, the Tsiolkovskiy Medal was established.
- NASA has published in three volumes the collected works of Tsiolkovskiy "Proceedings on rocketry".
- On March 23, 1887, the Tsiolkovskiys' house burned down (a neighbor, a charcoal burner, set fire to a hay barn by negligence), the library and almost all property perished. Tsiolkovskiy for a long time plunged into depression, which outwardly expressed itself in complete impassivity.
- The funeral of Tsiolkovskiy in the Country Garden on September 21 turned into a grandiose procession, in which, according to press reports, about 50 thousand people took part - almost the entire population of Kaluga.
- In 1989, Tsiolkovskiy's name was inducted in the Air and Space Hall of Fame at the San Diego Air and Space Museum.
- On October 5, 1919, Tsiolkovskiy's son Ivan died in agony from volvulus and poisoning with spoiled sauerkraut.
- During the execution of the Soyuz-Apollo program in 1975, the books of Tsiolkovskiy were sent into space. For this symbolic act, the lifetime editions of "Research of the World Spaces with Jet Instruments", "Space Rocket Trains" and "Aims of Astronomy" were selected.
- His father Eduard Tsiolkovskiy died suddenly on January 9, 1881 at the age of sixty-one. A letter about this reached his son too late, he did not even attend the funeral.
- 19-year-old son Ignatiy, a student at Moscow University, committed suicide on December 2, 1903, by taking potassium cyanide. Tsiolkovskiy went to Moscow for a funeral, lost consciousness there, and with difficulty returned to reality. Experiences became the basis for writing "Ethics".
- Tsiolkovskiy was a consistent opponent of the death penalty and violence against criminals in general, and reasoned that incorrigible individuals should be isolated from society in secluded places.
- In 1936, at the burial site of Tsiolkovskiy, according to the project of the architect B. Dmitriev, a monument-obelisk 12.5 meters high was erected. The pedestal was decorated with cast-iron bas-reliefs by sculptors I. Biryukov and Sh. Muratov, depicting a portrait of a scientist surrounded by schoolchildren; and rocket projectile in interstellar space; memorial inscriptions were also placed, reproducing a letter to Joseph Stalin.
- Konstantin Tsiolkovskiy and Varvara Sokolova had seven children: the eldest daughter Lyubov (1881-1957), four sons in a row - Ignatiy (1883, committed suicide in 1902), Aleksandr (1885-1923, also committed suicide), Ivan (1888 -1919), the youngest son Leontiy (1892, the next year died of whooping cough), and two more younger daughters, Maria (1894-1964) and Anna (1897-1922).
- On June 28, 1923, on the basis of depression, the son of Tsiolkovskiy, Aleksandr, who lived in Ukraine, committed suicide.
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