Fyodor Berezin

Donetsk, formerly known as Aleksandrovka, Yuzivka, Stalin and Stalino, is an industrial city in eastern Ukraine located on the Kalmius River in Donetsk Oblast. The population was estimated at 901,645 in the city core, with over 2 million in the metropolitan area (2011). According to the 2001 census, Donetsk was the fifth-largest city in Ukraine.

Anti-aircraft warfare, counter-air or air defence forces is the battlespace response to aerial warfare, defined by NATO as "all measures designed to nullify or reduce the effectiveness of hostile air action". It includes surface based, subsurface, and air-based weapon systems, associated sensor systems, command and control arrangements, and passive measures. It may be used to protect naval, ground, and air forces in any location. However, for most countries, the main effort has tended to be homeland defence. NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence, as are initiatives to adapt air defence to the task of intercepting any projectile in flight.

Kazakhstan, officially the Republic of Kazakhstan, is a transcontinental landlocked country located mainly in Central Asia and partly in Eastern Europe. It borders Russia to the north and west, China to the east, Kyrgyzstan to the southeast, Uzbekistan to the south, and Turkmenistan to the southwest, with a coastline along the Caspian Sea. Its capital is Astana, known as Nur-Sultan from 2019 to 2022. Almaty, Kazakhstan's largest city, was the country's capital until 1997. Kazakhstan is the world's ninth-largest country by land area and the world's largest landlocked country. It has a population of 19 million people and one of the lowest population densities in the world, at fewer than 6 people per square kilometre. Ethnic Kazakhs constitute a majority of the population, while ethnic Russians form a significant minority. Kazakhstan is a Muslim-majority country, although ethnic Russians in the country form a sizeable Christian community.

In European terminology, the Far East is the geographical region that includes East and Southeast Asia as well as, to a lesser extent, North Asia, particularly the Russian Far East. South Asia is sometimes also included for economic and cultural reasons.

Hard science fiction is a category of science fiction characterized by concern for scientific accuracy and logic. The term was first used in print in 1957 by P. Schuyler Miller in a review of John W. Campbell's Islands of Space in the November issue of Astounding Science Fiction. The complementary term soft science fiction, formed by analogy to hard science fiction, first appeared in the late 1970s. The term is formed by analogy to the popular distinction between the "hard" (natural) and "soft" (social) sciences, although there are examples generally considered as "hard" science fiction such as Isaac Asimov's Foundation series, built on mathematical sociology. Science fiction critic Gary Westfahl argues that neither term is part of a rigorous taxonomy; instead they are approximate ways of characterizing stories that reviewers and commentators have found useful.

Russian is an East Slavic language mainly spoken in Russia. It is the native language of the Russians and belongs to the Indo-European language family. It is one of four living East Slavic languages, and is also a part of the larger Balto-Slavic languages. Besides Russia itself, Russian is an official language in Belarus, Kazakhstan, and Kyrgyzstan, and is used widely as a lingua franca throughout Ukraine, the Caucasus, Central Asia, and to some extent in the Baltic states. It was the de facto language of the former Soviet Union.

Herbert George Wells was an English writer. Prolific in many genres, he wrote more than fifty novels and dozens of short stories. His non-fiction output included works of social commentary, politics, history, popular science, satire, biography and autobiography. Wells is now best remembered for his science fiction novels and has been called the "father of science fiction."

Kurt Vonnegut was an American writer and humorist known for his satirical and darkly humorous novels. In a career spanning over 50 years, he published fourteen novels, three short-story collections, five plays, and five nonfiction works; further collections have been published after his death.

The brothers Arkady Natanovich Strugatsky and Boris Natanovich Strugatsky were Soviet-Russian science-fiction authors who collaborated through most of their careers.