Benefits of space exploration

As the space race came to an end, a new rationale for investment in space exploration emerged, which was focused on the pragmatic use of space for improving life on Earth.[1] As the justification for government-funded space programs shifted to "the public good", space agencies began to articulate and measure the wider socio-economic benefits that might derive from their activities, including both the direct and indirect (or less obvious) benefits of space exploration.[1] However, such programs have also been criticised and a number of disbenefits cited.

Hurrican Ellen of 1973 was photographed from orbit by astronauts aboard the Skylab space station.

Direct and indirect benefits of space exploration

Space agencies, governments, researchers and commentators have isolated a large number of direct and indirect benefits of space exploration programs including:

  • new technologies that can be utilised in other industries and society (such as the development of communications satellites)
  • improved knowledge of space and the origin of the universe
  • cultural benefits.

In an attempt to quantify the benefits derived from space exploration, NASA calculated that 444,000 lives have been saved, 14,000 jobs have been created, 5 billion dollars in revenue has been generated, and there has been $6.2 billion in cost reductions due to spin-off programs from NASA research.[2] NASA states that among the many spin-off technologies that have come out of the space exploration program there have been notable advancements in the fields of health and medicine, transportation, public safety, consumer goods, energy and environment, information technology, and industrial productivity.[2] Solar panels, water-purification systems, dietary formulas and supplements, material science innovation, and global search and rescue systems are some of the ways in which these technologies have diffused into everyday life.[2][3]

The development of satellite technology

The development of artificial satellite technology was a direct result of space exploration. Since the first artificial satellite was launched by the USSR on October 4, 1957, Sputnik 1, thousands of satellites have been put into orbit around the Earth by more than 40 countries.

These satellites are used for a variety of applications including observation (by both military and civilian agencies), communication, navigation and weather monitoring. Space stations, space telescopes and spacecraft in orbit around the Earth are also regarded as satellites.

Communications satellites Communications satellites are used for a variety of purposes including television, telephone, radio, internet and military applications. According to Statista there were 2,666 active artificial satellites orbiting the Earth in 2020. Of these 1,327 belonged to the US and 363 to China.[4] Many of these satellites are in geostationary orbit 22,236 miles (35,785 km) above the equator, so that the satellite appears stationary at the same point in the sky. Communications satellites can also be in Medium Earth orbit (known as MEO satellites) with an Orbital altitude ranging from 2,000 to 36,000 kilometres (1,200 to 22,400 mi) above Earth and low Earth orbit (known as LEO satellites) at 160 to 2,000 kilometres (99 to 1,243 mi) above Earth. MEO and LEO orbits are closer to the surface of the Earth and therefore a larger number of satellites are required in such a constellation to provide continuous communications. Satellites are vital for providing communications to remote areas and ships where other communications technology cannot

Weather satellites The U.S., Europe, India, China, Russia and Japan all have weather satellites in orbit that are used to monitor the weather, environment and climate of the Earth. Polar orbiting weather satellites cover the entire Earth asynchronously, or geostationary satellites cover the same spot on the equator.[5] In addition to monitoring weather patterns for forecasting, which is extremely important for certain activities and industries (such as farming and fishing), meteorological satellites monitor fires, pollution, auroras, sand and dust storms, as well as snow cover and ice mapping. They have also been used to monitor ash clouds from volcanoes such as Mount St. Helens and Mount Etna[6] as well as major weather events such as El Niño and the Antarctic ozone hole.[7] Recently, weather monitoring satellites have also been used to assess the viability of solar panel sites by monitoring the cloud cover and weather patterns.[8] Nigeria and South Africa have successfully employed satellite-based disaster management and climate monitoring.[9]

International Space Station

The ISS

The International Space Station is a modular space station (habitable artificial satellite) in low Earth orbit that was built by 18 countries including NASA (US),Roscosmos (Russia), JAXA (Japan), ESA (Europe), and the CSA (Canada).[10][11] The station serves as a microgravity and space environment research laboratory in which scientific research is conducted in astrobiology, astronomy, meteorology, physics, and other fields.[12][13][14] The ISS is also used for testing spacecraft systems and equipment required for future long-duration missions to the Moon and Mars.[15]

Hubble Space Telescope The Hubble Space Telescope is a space telescope that was launched into low Earth orbit in 1990 by NASA with contributions from the European Space Agency. It was not the first space telescope, but it is one of the largest and most versatile.[16] Its orbit allows it to capture extremely high-resolution images with substantially lower background light than ground-based telescopes, enabling a deep view into space. Many Hubble observations have led to breakthroughs in astrophysics, such as determining the rate of expansion of the universe.

Knowledge of space

Since Sputnik 1 entered orbit in 1957 to perform Ionospheric experiments, the human understanding of earth and space has increased.[17] The List of missions to the Moon begin as early as 1958 and continued into the current age. A few successful lunar missions, by the USSR, include missions such as, the Luna 1 spacecraft that completed the first flyby of the moon in 1959, the Luna 3 lunar probe that took the first pictures of the far side of the moon in 1959, the Luna 10 orbiter that was the first orbiter of the moon in 1966, and the Lunokhod 1 lunar rover in 1970, which was the first rover that explored the surface of a world beyond earth. The United States also added significant lunar first, such as Apollo 8 in 1968 is the first successful human mission to orbit the moon and the historic Apollo 11 when man first landed on the moon.[18] Missions to the moon have collected samples of lunar materials and there are now multiple satellites such as ARTEMIS P1 that currently orbit the moon and collect data.[18]

Biomedical research

Beginning in 1967, NASA successfully began its Biosatellite program that initially took frog eggs, amoeba, bacteria, plants and mice and studied the effects of zero gravity on these biological life forms.[19] Studies of human life in space have augmented the understanding of the effects of adjusting to a space environment, such as alterations in body fluids, negative influences on the immune system and effects of space on sleep patterns.[20] Current space research pursuits are divided into the subjects of Space Biology, which studies the effects of space on smaller organisms such as cells, Space Physiology, which is the study of the effects of space on the human body and Space Medicine, which examines the possible dangers of space on the human body.[20] Discoveries concerning the human body and space, particularly the effects on the development of bones, may provide further understanding of biomineralization and the process of gene transcription.[21]

Culture and inspiration
Published by NASA in March 2019, the "Jupiter Marble" by the Juno probe

Human Culture exists as a social environment made up by traditions, norms, rules written or unwritten, and social practices. Cultures can be specific to groups of any size such as a family or group of friends but also as large as a state or nation. The range and diversity of human culture is markedly large. International collaboration in the space age brought together different cultures and as a result, the exchange and advancement of human culture. In over fifty years of space travel, the diversity of those working in space and in the field as a whole has dramatically increased from the beginnings of space exploration. This progression in diversity brought more cultures into close quarters and resulted in the enrichment of human culture globally.[22]

The innovation and exploration of the space age has served as an inspiration to humankind. Breaking through into space travel, man leaving earth and defeating gravity, taking steps on the moon, and various other achievements were pivotal moments in human cultural development. In particular, the scientific and technological advancements stand as an inspiration to the scientific community of students, teachers, and researchers worldwide. Moreover, space exploration has also inspired innovative training programs aimed at preschoolers, such as the Future Astronauts Program. It is evident that by drawing in the wonder of space together with the knowledge and skills developed through space exploration into classrooms, children can be strongly motivated and empowered from a young age.[23]

Space exploration will continue to foster international inspiration and collaboration, and pose revolutionary philosophical, political, and scientific questions and debates.[24]

Criticisms, disbenefits and critiques

There are three main types of criticism levied against space exploration: the cost, ideological criticism, and social criticism.

The calculations of the benefits of space exploration have frequently been criticised due to a conflict of interests argument (the agencies responsible are the ones who calculate the benefits) and the complexity of quantifying the benefits. As Matthew Williams stated: "How do you put a dollar value on scientific knowledge, inspiration, or the expansion of our frontiers?" [25]

While some commentators have argued that space exploration is a lifeboat strategy to avoid annihilation of the human race, others have countered that is misses the point. Amitai Etzioni – Professor at The George Washington University and an adviser to the US's Carter administration – countered in Humanity Would Be Better off Saving Earth, Rather Than Colonizing Mars that: "It is better to hold off disasters at home than to assume all is lost". Etzioni also pointed out the vast cost of colonisation of extra-terrestrial planets by citing that Elon Musk, an advocate of space exploration and colonization, had calculated the cost of sending the first 10 astronauts to Mars at £10 billion per person.[26] The Mars Climate Orbiter is a good example of this argument, burning up before sending any data at a cost of $328 million[27]

Social critics say that the cost of space exploration cannot be justified when hunger and poverty are rampant. "As they see it, space exploration takes money, resources, and talent away from helping people in need and from improving the quality of life for everybody."[28] In 1967, Martin Luther King Jr. said: "Without denying the value of scientific endeavor, there is a striking absurdity in committing billions to reach the moon where no people live, while only a fraction of that amount is appropriated to service the densely populated slums."

Some critics have pointed out the hazards of space debris which affect satellites, spacecraft and the surface of the Earth. For example, in March 2009 debris believed to be a 10 cm (3.9 in) piece of the Kosmos 1275 satellite hit the ISS.[29] Although it is relatively rare for people on the ground to be hit by space debris it does happen. In 1969 five sailors on a Japanese ship were injured by space debris.[30] In 1997 an Oklahoma woman, Lottie Williams, was injured when she was hit in the shoulder by a 10 cm × 13 cm (3.9 in × 5.1 in) piece of blackened, woven metallic material confirmed as part of the propellant tank of a Delta II rocket which launched a U.S. Air Force satellite the year before.[31][32] Environmentalists have pointed to the pollution caused by space exploration and at distracting Americans from a mounting pollution problem.[33]

Feminists criticised US space exploration programs, and even filed lawsuits, for sexist hiring practices and all-male astronaut corps.[34]

It is unclear how much the American public agree with the importance of space exploration. Gallup polls in the 1960s showed that less than 50% Americans considered the endeavor worth the cost. An NBC News and Associated Press Poll in 1979 found that only 41% of respondents considered the benefits worth the costs.

See also

References
  1. Gurtuna, Ozgur (2013). Fundamentals of Space Business and Economics. SpringerBriefs in Space Development. Springer New York Heidelberg Dordrecht London: Springer. p. 31. doi:10.1007/978-1-4614-6696-3. ISBN 978-1-4614-6695-6.
  2. NASA. Spinoff. 2012, https://spinoff.nasa.gov/Spinoff2012/pdf/Spinoff2012.pdf.
  3. ISECG (September 2013). "Benefits Stemming from Space Exploration" (PDF).
  4. "Number of satellites in orbit by major country as of March 31, 2020". Statista.com. December 7, 2020.
  5. NESDIS. Satellites. Retrieved on July 4, 2008.
  6. NOAA. NOAA Satellites, Scientists Monitor Mt. St. Helens for Possible Eruption. Retrieved on July 4, 2008.
  7. "NOAA Satellite Information System (NOAASIS)". noaasis.noaa.gov. Archived from the original on August 25, 2018. Retrieved April 12, 2018.
  8. Pierro, Marco; De Felice, Matteo; Maggioni, Enrico; Moser, David; Perotto, Alessandro; Spada, Francesco; Cornaro, Cristina (December 2017). "Data-driven upscaling methods for regional photovoltaic power estimation and forecast using satellite and numerical weather prediction data". Solar Energy. 158: 1026–1038. Bibcode:2017SoEn..158.1026P. doi:10.1016/j.solener.2017.09.068.
  9. MacLeish, Marlene Y.; Akinyede, Joseph O.; Goswami, Nandu; Thomson, William A. (November 1, 2012). "Global partnerships: Expanding the frontiers of space exploration education". Acta Astronautica. 80: 190–196. Bibcode:2012AcAau..80..190M. doi:10.1016/j.actaastro.2012.05.034. ISSN 0094-5765.
  10. Gary Kitmacher (2006). Reference Guide to the International Space Station. Apogee Books Space Series. Canada: Apogee Books. pp. 71–80. ISBN 978-1-894959-34-6. ISSN 1496-6921.
  11. "Human Spaceflight and Exploration—European Participating States". European Space Agency (ESA). 2009. Retrieved January 17, 2009.
  12. "International Space Station Overview". ShuttlePressKit.com. June 3, 1999. Retrieved February 17, 2009.
  13. "Fields of Research". NASA. June 26, 2007. Archived from the original on January 23, 2008.
  14. "Getting on Board". NASA. June 26, 2007. Archived from the original on December 8, 2007. This article incorporates text from this source, which is in the public domain.
  15. "ISS Research Program". NASA. Archived from the original on February 13, 2009. Retrieved February 27, 2009.
  16. Canright, Shelley. "NASA's Great Observatories". NASA. Retrieved April 26, 2008.
  17. Kuznetsov; Sinelnikov & Alpert (June 2015). "Yakov Alpert: Sputnik-1 and the first satellite ionospheric experiment". Advances in Space Research. 55 (12): 2833–839. Bibcode:2015AdSpR..55.2833K. doi:10.1016/j.asr.2015.02.033.
  18. "Moon: NASA Science: Missions". Moon: NASA Science. Retrieved April 17, 2018.
  19. "NASA – 50 Years of NASA History". www.nasa.gov. Retrieved April 10, 2018.
  20. Clément, Gilles (2006). Fundamentals of Space Biology: Research on Cells, Animals, and Plants in Space. New York: NY: Springer New York.
  21. Clément, Gilles (2005). "Fundamentals of Space Medicine". The Space Technology Library. 17: 3.
  22. Harris, Philip R. (January 1, 1986). "The influence of culture on space developments". Behavioral Science. 31 (1): 12–28. doi:10.1002/bs.3830310103. hdl:2060/19930007674. ISSN 1099-1743.
  23. Sanders, Claire (July 10, 2018). "Every Child Should Train Like A Future Astronaut. This Is Why". Fun Academy. Retrieved July 30, 2018.
  24. Benefits Stemming from Space Exploration (PDF). ISECG. 2013.
  25. Matthew S. Williams. "Is It Worth It? The Costs and Benefits of Space Exploration". Interesting Engineering.
  26. Amitai Etzioni. "Humanity Would Be Better Saving Earth Rather Than Colonizing Mars". National Interest.
  27. "Mars Climate Orbiter Fact Sheet". NASA-JPL. Retrieved August 3, 2020.
  28. Gonzalo Munevar (1986). Space colonies and the philosophy of space exploration, AIP Conference Proceedings, Volume 148, pp. 2–12.
  29. Haines, Lester. "ISS spared space junk avoidance manoeuvre" Archived August 10, 2017, at the Wayback Machine, The Register, March 17, 2009.
  30. U.S. Congress, Office of Technology Assessment, "Orbiting Debris: A Space Environmental Problem" Archived March 4, 2016, at the Wayback Machine, Background Paper, OTA-BP-ISC-72, U.S. Government Printing Office, September 1990, p. 3
  31. "Today in Science History" Archived January 13, 2006, at the Wayback Machine todayinsci.com. Retrieved March 8, 2006.
  32. Tony Long, "Jan. 22, 1997: Heads Up, Lottie! It's Space Junk!" Archived January 2, 2018, at the Wayback Machine, wired, January 22, 2009. Retrieved March 27, 2016
  33. Neil M. Maher (July 16, 2019). "Not Everyone Wanted a Man on the Moon".
  34. Neil M. Maher (July 16, 2019). "Not Everyone Wanted a Man on the Moon".
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.