HOME

TheInfoList



OR:

The Space Age is a period encompassing the activities related to the
Space Race The Space Race was a 20th-century competition between two Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between the tw ...
,
space exploration Space exploration is the use of astronomy and space technology to explore outer space. While the exploration of space is carried out mainly by astronomers with telescopes, its physical exploration though is conducted both by robotic spacec ...
,
space technology Space technology is technology for use in outer space, in travel (''astronautics'') or other activities beyond Earth's atmosphere, for purposes such as spaceflight, space exploration, and Earth observation. Space technology includes space vehicles ...
, and the cultural developments influenced by these events, beginning with the launch of Sputnik 1 during 1957, and continuing to the present.


History


The 1950s-1970s

The Space Age was an era of new military, political, technological, and scientific developments which began with the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen national ...
's October 4, 1957 launch of Earth's first
artificial satellite A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisoto ...
Sputnik 1 Sputnik 1 (; see § Etymology) was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for t ...
. Weighing and orbiting the Earth once every 98 minutes,. The
Space Race The Space Race was a 20th-century competition between two Cold War rivals, the United States and the Soviet Union, to achieve superior spaceflight capability. It had its origins in the ballistic missile-based nuclear arms race between the tw ...
between the United States and the Soviet Union began in 1957 with the launching of the first artificial
satellite A satellite or artificial satellite is an object intentionally placed into orbit in outer space. Except for passive satellites, most satellites have an electricity generation system for equipment on board, such as solar panels or radioisotope ...
Sputnik 1 Sputnik 1 (; see § Etymology) was the first artificial Earth satellite. It was launched into an elliptical low Earth orbit by the Soviet Union on 4 October 1957 as part of the Soviet space program. It sent a radio signal back to Earth for t ...
. The race resulted in rapid advances in
rocket A rocket (from it, rocchetto, , bobbin/spool) is a vehicle that uses jet propulsion to accelerate without using the surrounding air. A rocket engine produces thrust by reaction to exhaust expelled at high speed. Rocket engines work entirely fr ...
ry, materials science, and other areas. Much of the technology developed for space applications has been spun off and found additional uses, such as
memory foam Memory foam consists mainly of polyurethane with additional chemicals that increase its viscosity and density. It is often referred to as "viscoelastic" polyurethane foam, or low-resilience polyurethane foam (LRPu). The foam bubbles or ‘cells’ ...
. In 1958 the United States launched its first satellite,
Explorer 1 Explorer 1 was the first satellite launched by the United States in 1958 and was part of the U.S. participation in the International Geophysical Year (IGY). The mission followed the first two satellites the previous year; the Soviet Union's ...
. The same year
President Dwight D. Eisenhower Dwight David "Ike" Eisenhower (born David Dwight Eisenhower; ; October 14, 1890 – March 28, 1969) was an American military officer and statesman who served as the 34th president of the United States from 1953 to 1961. During World War II, ...
created the National Aeronautics and Space Administration, commonly known as
NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding t ...
. Prior to the first attempted
human spaceflight Human spaceflight (also referred to as manned spaceflight or crewed spaceflight) is spaceflight with a crew or passengers aboard a spacecraft, often with the spacecraft being operated directly by the onboard human crew. Spacecraft can also be ...
, various animals were flown into
outer space Outer space, commonly shortened to space, is the expanse that exists beyond Earth and its atmosphere and between celestial bodies. Outer space is not completely empty—it is a near-perfect vacuum containing a low density of particles, pred ...
to identify potential detrimental effects of high
g-force The gravitational force equivalent, or, more commonly, g-force, is a measurement of the type of force per unit mass – typically acceleration – that causes a perception of weight, with a g-force of 1 g (not gram in mass measure ...
s in takeoff and landing,
microgravity The term micro-g environment (also μg, often referred to by the term microgravity) is more or less synonymous with the terms ''weightlessness'' and ''zero-g'', but emphasising that g-forces are never exactly zero—just very small (on the I ...
, and radiation exposure at high altitudes. The Space Race reached its peak with the Apollo program that captured the imagination of much of the world's population.. From 1961 to 1964, NASA’s budget was increased almost 500 percent, and the lunar landing program eventually involved some 34,000 NASA employees and 375,000 employees of industrial and university contractors. The Soviet Union proceeded tentatively with its own lunar landing program which it did not publicly acknowledge, partly due to internal debate over its necessity and the untimely death (in January 1966) of Sergey Korolev, chief engineer of the Soviet space program. The landing of
Apollo 11 Apollo 11 (July 16–24, 1969) was the American spaceflight that first landed humans on the Moon. Commander Neil Armstrong and lunar module pilot Buzz Aldrin landed the Apollo Lunar Module ''Eagle'' on July 20, 1969, at 20:17 UTC, an ...
was watched by over 500 million people around the world and is widely recognized as one of the defining moments of the 20th century. Since then, public attention has largely moved to other areas. The last major leap of the Space Age was the
Skylab Skylab was the first United States space station, launched by NASA, occupied for about 24 weeks between May 1973 and February 1974. It was operated by three separate three-astronaut crews: Skylab 2, Skylab 3, and Skylab 4. Major operations in ...
and Salyute programs, which established the first space stations for the U.S. and USSR in Earth Orbit following termination of both country's moon programs.


The 1970s to 2010s

At this point, the space age had largely declined and was for the most part over, as public attention was no longer focused on this area. In the 1970s, there was a very large decline in manned space flights in the U.S. as the
shuttle program The Space Shuttle program was the fourth human spaceflight program carried out by the U.S. National Aeronautics and Space Administration (NASA), which accomplished routine transportation for Earth-to-orbit crew and cargo from 1981 to 2011. I ...
was getting ready to kick into gear, and the space race had been over since the Apollo-Soyuz test project of 1975. The shuttle program restored spaceflight to the U.S. following the Skylab program, but the Space Shuttle ''Challenger'' disaster in 1986 marked a significant decline in crewed Shuttle launches. Following the disaster, NASA grounded all Shuttles for safety concerns until 1988. During the 1990s funding for space-related programs fell sharply as the remaining structures of the now-dissolved Soviet Union disintegrated and
NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding t ...
no longer had any direct competition. Since then, participation in space launches has increasingly widened to include more governments and commercial interests. Since the 1990s, the public perception of space exploration and space-related technologies has been that such endeavors are increasingly commonplace. NASA permanently grounded all U.S. Space Shuttles in 2011. NASA has since relied on
Russia Russia (, , ), or the Russian Federation, is a List of transcontinental countries, transcontinental country spanning Eastern Europe and North Asia, Northern Asia. It is the List of countries and dependencies by area, largest country in the ...
and
SpaceX Space Exploration Technologies Corp. (SpaceX) is an American spacecraft manufacturer, launcher, and a satellite communications corporation headquartered in Hawthorne, California. It was founded in 2002 by Elon Musk with the stated goal of ...
to take American astronauts to and from the
International Space Station The International Space Station (ISS) is the largest modular space station currently in low Earth orbit. It is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA ...
.


The Modern Era

In the early 21st century, the Ansari X Prize competition was set up to help jump-start
private spaceflight Private spaceflight is spaceflight or the development of spaceflight technology that is conducted and paid for by an entity other than a government agency. In the early decades of the Space Age, the government space agencies of the Soviet Un ...
. The winner,
Space Ship One SpaceShipOne is an experimental air-launched rocket-powered aircraft with sub-orbital spaceflight capability at speeds of up to 3,000 ft/s (900 m/s, 3240 km/h), using a hybrid rocket motor. The design features a unique "feathering" at ...
in 2004, became the first spaceship not funded by a government agency. Several countries now have space programs; from related technology ventures to full-fledged space programs with launch facilities. There are many scientific and commercial satellites in use today, with thousands of satellites in orbit, and several countries have plans to send humans into space. Some of the countries joining this new race are
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
,
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the seventh-largest country by area, the second-most populous country, and the most populous democracy in the world. Bounded by the Indian Ocean on the so ...
,
China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...
,
Israel Israel (; he, יִשְׂרָאֵל, ; ar, إِسْرَائِيل, ), officially the State of Israel ( he, מְדִינַת יִשְׂרָאֵל, label=none, translit=Medīnat Yīsrāʾēl; ), is a country in Western Asia. It is situated ...
and the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and North ...
, all of which have employed surveillance satellites. There are several other countries with less extensive space programs, including
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
,
Germany Germany,, officially the Federal Republic of Germany, is a country in Central Europe. It is the second most populous country in Europe after Russia, and the most populous member state of the European Union. Germany is situated betwe ...
,
Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...
, and
Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...
. As for the United States space program, NASA is currently constructing a deep-space crew capsule named the Orion. NASA's goal with this new space capsule is to carry humans to
Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury (planet), Mercury. In the English language, Mars is named for the Mars (mythology), Roman god of war. Mars is a terr ...
. The Orion spacecraft is due to be completed in the early 2020s. NASA is hoping that this mission will “usher in a new era of space exploration.” Another major factor affecting the current Space Age is the privatization of space flight. A significant private spaceflight company is
SpaceX Space Exploration Technologies Corp. (SpaceX) is an American spacecraft manufacturer, launcher, and a satellite communications corporation headquartered in Hawthorne, California. It was founded in 2002 by Elon Musk with the stated goal of ...
which became the proprietor of one of world's most capable operational launch vehicle when they launched their current largest rocket, the
Falcon Heavy Falcon Heavy is a partially reusable heavy-lift launch vehicle that is produced by SpaceX, an American aerospace manufacturer. The rocket consists of two strap-on boosters made from Falcon 9 first stages, a center core also made from a Falc ...
in 2018.
Elon Musk Elon Reeve Musk ( ; born June 28, 1971) is a business magnate and investor. He is the founder, CEO and chief engineer of SpaceX; angel investor, CEO and product architect of Tesla, Inc.; owner and CEO of Twitter, Inc.; founder of The Bori ...
, the founder and CEO of SpaceX, has put forward the goal of establishing a colony of one million people on
Mars Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System, only being larger than Mercury (planet), Mercury. In the English language, Mars is named for the Mars (mythology), Roman god of war. Mars is a terr ...
and the company is developing its
Starship A starship, starcraft, or interstellar spacecraft is a theoretical spacecraft designed for interstellar travel, traveling between planetary systems. The term is mostly found in science fiction. Reference to a "star-ship" appears as early as 188 ...
launch vehicle to facilitate this. Since the Demo-2 mission for NASA in 2020 in which SpaceX launched astronauts for the first time to the International Space Station, the company has maintained an orbital human spaceflight capability.
Blue Origin Blue Origin, LLC is an American private spaceflight, privately funded aerospace manufacturer and sub-orbital spaceflight services company headquartered in Kent, Washington. Founded in 2000 by Jeff Bezos, the founder and executive chairman of Am ...
, a private company founded by
Amazon.com Amazon.com, Inc. ( ) is an American multinational technology company focusing on e-commerce, cloud computing, online advertising, digital streaming, and artificial intelligence. It has been referred to as "one of the most influential economi ...
founder
Jeff Bezos Jeffrey Preston Bezos ( ;; and Robinson (2010), p. 7. ''né'' Jorgensen; born January 12, 1964) is an American entrepreneur, media proprietor, investor, and commercial astronaut. He is the founder, executive chairman, and former preside ...
, is developing rockets for use in
space tourism Space tourism is human space travel for recreational purposes. There are several different types of space tourism, including orbital, suborbital and lunar space tourism. During the period from 2001 to 2009, seven space tourists made eight s ...
, commercial satellite launches, and eventual missions to the Moon and beyond. Richard Branson's company
Virgin Galactic Virgin Galactic is an American spaceflight company founded by Richard Branson and his British Virgin Group retains an 11.9% stake through Virgin Investments Limited. It is headquartered in California, and operates from New Mexico. The company i ...
is concentrating on launch vehicles for space tourism. A spinoff company,
Virgin Orbit Virgin Orbit is a company within the Virgin Group which launch service provider, provides launch services for small satellites. On January 17, 2021, their ''LauncherOne'' rocket successfully reached orbit for the first time, and successfully dep ...
, air-launches small satellites with their
LauncherOne LauncherOne is a two-stage orbital launch vehicle developed and flown by Virgin Orbit that began operational flights in 2021, after being in development from 2007 to 2020. It is an air-launched rocket, designed to carry smallsat payloads of u ...
rocket. Another small-satellite launcher,
Rocket Lab Rocket Lab is a public American aerospace manufacturer and launch service provider, with a New Zealand subsidiary. The company operates lightweight Electron orbital rockets, which provide dedicated launches for small satellites. Rocket Lab also ...
, has developed the
Electron rocket Electron is a two-stage, partially recoverable orbital launch vehicle developed by Rocket Lab, an American aerospace company with a wholly owned New Zealand subsidiary. Electron was developed to service the commercial small satellite launch mar ...
and the Photon satellite bus for sending spacecraft further into the Solar System. The Space Age marked a major comeback and return with the launch of NASA's Space Launch system during the Artemis 1 mission on November 16th, 2022; it marked the first time a human rated spacecraft had been to the Moon in nearly 50 years, as well as the return of United States capability to get astronauts to the Moon with the Space Launch System and Orion.


Chronology


Earlier spaceflights

The Space Age might also be considered to have begun much earlier than October 4, 1957, because in June 1944, a German
V-2 rocket The V-2 (german: Vergeltungswaffe 2, lit=Retaliation Weapon 2), with the technical name ''Aggregat 4'' (A-4), was the world’s first long-range guided ballistic missile. The missile, powered by a liquid-propellant rocket engine, was developed ...
became the first manmade object to enter
space Space is the boundless three-dimensional extent in which objects and events have relative position and direction. In classical physics, physical space is often conceived in three linear dimensions, although modern physicists usually consider ...
, albeit only briefly. Some even consider March 1926 as the beginning of the Space Age, when American rocket pioneer
Robert H. Goddard Robert Hutchings Goddard (October 5, 1882 – August 10, 1945) was an American engineer, professor, physicist, and inventor who is credited with creating and building the world's first Liquid-propellant rocket, liquid-fueled rocket. ...
launched the world's first liquid fuel rocket, though his rocket did not reach outer space. Also already in the 1920s the world's first large-scale experimental rocket program,
Opel-RAK Opel-RAK were a series of rocket vehicles produced by German automobile manufacturer Fritz von Opel, of the Opel car company, in association with others, including Max Valier, Julius Hatry, and Friedrich Wilhelm Sander. Opel RAK is generally con ...
, was initiated under the leadership of
Fritz von Opel Fritz Adam Hermann von Opel (4 May 1899 – 8 April 1971) was a German rocket technology pioneer and automotive executive, nicknamed "Rocket-Fritz". He is remembered mostly for his spectacular demonstrations of rocket propulsion that earned him an ...
and
Max Valier Max Valier (9 February 1895 – 17 May 1930) was an Austrian rocketry pioneer. He was a leading figure in the world's first large-scale rocket program, Opel-RAK, and helped found the German ''Verein für Raumschiffahrt'' (VfR – "Spacefligh ...
. Speed records for ground and rail vehicles were achieved in 1928 and von Opel piloted the world's first public flight of a rocket plane,
Opel RAK.1 The Opel RAK.1 (also known as the Opel RAK.3) was the world's first purpose-built rocket-powered aircraft. It was designed and built by Julius Hatry under commission from Fritz von Opel, who flew it on September 30, 1929 in front of a large crowd ...
. The
Great Depression The Great Depression (19291939) was an economic shock that impacted most countries across the world. It was a period of economic depression that became evident after a major fall in stock prices in the United States. The economic contagio ...
put an end to the Opel-RAK program but it nevertheless had a strong and long-lasting impact on later spaceflight pioneers, in particular on
Wernher von Braun Wernher Magnus Maximilian Freiherr von Braun ( , ; 23 March 191216 June 1977) was a German and American aerospace engineer and space architect. He was a member of the Nazi Party and Allgemeine SS, as well as the leading figure in the develop ...
who would eventually head the Nazi era V2 program. Since the V-2 rocket flight was undertaken in secrecy, it was not public knowledge for many years afterward. Further, the German launches, as well as the subsequent
sounding rocket A sounding rocket or rocketsonde, sometimes called a research rocket or a suborbital rocket, is an instrument-carrying rocket designed to take measurements and perform scientific experiments during its sub-orbital flight. The rockets are used to ...
tests performed in both the United States and the Soviet Union during the late 1940s and early 1950s, were not considered significant enough to start a new age because they did not reach orbit. Having a rocket powerful enough to reach orbit meant that a nation could place a payload anywhere on the planet, or to use another term, possessed an
intercontinental ballistic missile An intercontinental ballistic missile (ICBM) is a ballistic missile with a range greater than , primarily designed for nuclear weapons delivery (delivering one or more thermonuclear warheads). Conventional, chemical, and biological weapons c ...
. The fact that after such a development nowhere on Earth was safe from a nuclear warhead is why the orbital standard is commonly used to define when the space age began.


Cultural influences


Arts and architecture

The Space Age is considered to have influenced: *
Automotive design Automotive design is the process of developing the appearance (and to some extent the ergonomics) of motor vehicles - including automobiles, motorcycles, trucks, buses, coaches, and vans. The functional design and development of a modern moto ...
: Virgil Exner's Forward Look, 1957-1961 *
Googie architecture Googie architecture ( ) is a type of futurist architecture influenced by car culture, Jet aircraft, jets, the Atomic Age and the Space Age. It originated in Southern California from the Streamline Moderne architecture of the 1930s, and was pop ...
* Space Age fashions by
André Courrèges André Courrèges (; 9 March 1923 – 7 January 2016) was a French fashion designer. He was particularly known for his streamlined 1960s designs influenced by modernism and futurism, exploiting modern technology and new fabrics. Courrèges de ...
,
Pierre Cardin Pierre Cardin (, , ), born Pietro Costante Cardino (2 July 1922 – 29 December 2020), was an Italian-born naturalised-French fashion designer. He is known for what were his avant-garde style and Space Age designs. He preferred geometric shap ...
,
Paco Rabanne Francisco Rabaneda Cuervo (born 18 February 1934), more commonly known under the pseudonym of Paco Rabanne (; ), is a Spanish fashion designer who became known as an ''enfant terrible'' of the 1960s French fashion world. Early life and educati ...
,
Rudi Gernreich Rudolf "Rudi" Gernreich (August 8, 1922 April 21, 1985) was an Austrian people, Austrian-born American fashion designer whose avant-garde clothing designs are generally regarded as the most innovative and dynamic fashion of the 1960s. He purposef ...
,
Emanuel Ungaro Emanuel Ungaro (13 February 1933 – 21 December 2019) was a French fashion designer who founded the eponymous fashion house in 1965. Early life Ungaro's Italian father fled to France from Francavilla Fontana of Brindisi province because of the ...
, Jean-Marie Armand,
Michèle Rosier Michèle Lazareff Rosier (; 3 June 1930 – 2 April 2017) was a French fashion journalist and designer who founded the V de V sportswear label. In addition to this, she worked as a film director and screenwriter since 1973. Early life and educat ...
, and
Diana Dew Diana Dew (June 25, 1943 – February 2008) was an American fashion designer known for creating early electronic clothing, or e-textiles, in the 1960s. Early life Born on June 25, 1943, in Memphis, Tennessee, Dew was a fashion model from age fou ...
* Furniture design of the 1950s and '60s by
Eero Saarinen Eero Saarinen (, ; August 20, 1910 – September 1, 1961) was a Finnish-American architect and industrial designer noted for his wide-ranging array of designs for buildings and monuments. Saarinen is best known for designing the General Motors ...
,
Arne Jacobsen Arne Emil Jacobsen, Hon. FAIA () 11 February 1902 – 24 March 1971) was a Danish architect and furniture designer. He is remembered for his contribution to architectural functionalism and for the worldwide success he enjoyed with simple we ...
,
Eero Aarnio Eero Aarnio (born 21 July 1932) is a Finnish interior designer, noted for his innovative furniture designs in the 1960s, such as his plastic and fibreglass chairs. He was born in Helsinki. Aarnio studied at the Institute of Industrial Arts in ...
, and
Verner Panton Verner Panton (13 February 1926 – 5 September 1998) is considered one of Denmark's most influential 20th-century furniture and interior designers. During his career, he created innovative and futuristic designs in a variety of materials, especi ...
*
Amusement park attraction An amusement park is a park that features various attractions, such as rides and games, as well as other events for entertainment purposes. A theme park is a type of amusement park that bases its structures and attractions around a central ...
s, such as
TWA Moonliner From 1955 through 1962, the TWA Moonliner was part of the first futuristic exhibit located in Disneyland's Tomorrowland. It was also an early example of modern product placement advertising by TWA's Howard Hughes teaming up with Walt Disney as th ...
and Mission: Space. * Cold War playground equipment


Music

The Space Age also inspired musical genres: *
Space age pop Space age pop is a subgenre of pop and easy listening music associated with Mexican and American composers and songwriters in the Space Age of the 1950s and 1960s. Also known as bachelor pad music or lounge music,''Pulse'' (Monthly music digest ...
*
Space music Space music, also called spacemusic or space ambient, is a subgenre of new-age music and is described as "tranquil, hypnotic and moving". It is derived from ambient music and is associated with lounge music, easy listening, and elevator music. ...
*
Space rock Space rock is a music genre characterized by loose and lengthy song structures centered on instrumental textures that typically produce a hypnotic, otherworldly sound. It may feature distorted and reverberation-laden guitars, minimal drummin ...
*
Space-themed music Space-themed music is any music, from any genre or style, with lyrics or titles relating to outer space or spaceflight. Songs or other musical forms influenced by the concept of outer space have appeared in music throughout history, both in inst ...


See also

*
SEDS Students for the Exploration and Development of Space (SEDS) is a non-profit international student organization whose purpose is to drive space advocacy of space exploration and development through educational and engineering projects. Histo ...
*
Information Age The Information Age (also known as the Computer Age, Digital Age, Silicon Age, or New Media Age) is a historical period that began in the mid-20th century. It is characterized by a rapid shift from traditional industries, as established during ...
*
Jet Age The Jet Age is a period in the history of aviation defined by the advent of aircraft powered by jet turbine engines, and by the social change this brought about. Jet airliners were able to fly much higher, faster, and farther than older pisto ...
*
Atomic Age The Atomic Age, also known as the Atomic Era, is the period of history following the detonation of the first nuclear weapon, The Gadget at the ''Trinity'' test in New Mexico, on July 16, 1945, during World War II. Although nuclear chain reaction ...


References


External links

*


Interactive media

* . {{Spaceflight Spaceflight Historical eras 20th century 1957 introductions 1957 in spaceflight