Rikunarita-ORG/Wikinium huggingface dataset:
# Tycho Brahe

| Tycho Brahe |
| --- |
| Brahe wearing the Order of the Elephant |
| Born | Tyge Ottesen Brahe 14 December 1546 Knutstorp Castle, Scania, Denmark (now Sweden) |
| Died | 24 October 1601(1601-10-24) (aged 54) Prague, Habsburg Bohemia, Holy Roman Empire (now Czech Republic) |
| Nationality | Danish |
| Alma mater | University of Copenhagen Leipzig University University of Rostock |
| Occupation(s) | Nobleman, astronomer, writer |
| Known for | Tychonic system *Rudolphine Tables* |
| Spouse | Kirsten Barbara Jørgensdatter |
| Children | 8 |
| Parent(s) | Otte Brahe Beate Clausdatter Bille |
| Signature |
|  |

Monument of Tycho Brahe and Johannes Kepler in Prague
**Tycho Brahe**  (14 December 1546 — 24 October 1601) was an astronomer from Denmark. He observed the night sky before the invention of the telescope. With money from the King of Denmark he built a large observatory called Uraniborg on the island of Hven in Denmark.

He discovered that the universe outside the Solar System could change when he studied a supernova and a comet. Johannes Kepler was his assistant. Tycho made very careful observations of the planets. When Tycho died in 1601, Kepler continued Tycho's work.

Tycho was not a modern scientist. He believed in astrology, and his astronomy was a strange mixture of scientific observation and religious belief. Although he rejected the Ptolemaic system, he also rejected the Copernican system. He developed a geocentric theory that imagined the Sun and Moon orbited the Earth, but the other planets orbited the Sun.

Unlike most astronomers of his time, he did not believe in the unchanging celestial realm or spheres. Tycho's Nova, now called SN 1572, proved that changes did take place. Also, he worked out that comets were real celestial objects, and that their orbits were different from those of the planets.

## Related pages

* Johannes Kepler
* List of Danish writers

## Other websites

* Tycho Brahe – Accomplishments, Biography, & Facts. Encyclopædia Britannica
# Computer speaker

Example of two speakers
**Computer speaker** is oupout device for computer, to play sounds and music. Speakers contain amplifiers which vibrate to produce the sound. They come in many different forms. Some speakers are already attached to a computer. Some speakers are wireless. They work by Bluetooth.
# Swing bridge

A **swing bridge** is built over a river or canal and can be opened to let ships or boats pass. It turns around a central support - although small swing bridges on canals often are only supported from one end.
# Richard Wiseman

| Richard Wiseman |
| --- |
| Wiseman in 2014 |
| Born | Richard J. Wiseman  (1966-09-17) 17 September 1966 Luton, England |
| Alma mater | * University College London (BSc)
* University of Edinburgh (PhD)
 |
| **Scientific career** |
| Institutions | University of Hertfordshire |
| Thesis | *The assessment of psychic claimants : an application of schema theory to the evaluation of strong psychic claims* (1992) |
| Doctoral advisor | Robert L. Morris |
|  |
| Website | richardwiseman.wordpress.com
Richard Wiseman's voice

Recorded October 2016 |

**Richard J. Wiseman** (born 17 September 1966) is a British humanist, psychologist and writer. He was a Professor of the Public Understanding of Psychology at the University of Hertfordshire in the United Kingdom. He has written several best-selling popular psychology books that have been translated into over 30 languages.

He is a fellow for the Committee for Skeptical Inquiry.
# Population growth

World human population estimates from 1800 to 2100, with estimated range of future population after 2020 based on "high" and "low" scenarios. Data from the United Nations projections in 2019.

| Population |
| --- |
| Years passed | Year | Billion |
| – | 1800 | 1 |
| 127 | 1927 | 2 |
| 33 | 1960 | 3 |
| 14 | 1974 | 4 |
| 13 | 1987 | 5 |
| 12 | 1999 | 6 |
| 12 | 2011 | 7 |
| *12* | *2023*\* | 8 |
| *14* | *2037*\* | 9 |
| *18* | *2055*\* | 10 |
| *33* | *2088*\* | 11 |
| \*World Population Prospects 2017 (United Nations Population Division) |

**Population growth** is the rate at which a population grows or expands. For example, if a population increased from 100 to 110 in a year, then it would have had a population growth of 10% per year.

**Population decline** is the opposite. It is when the population shrinks. It is also called **depopulation**. In 2024, the Cook Islands, Marshall Islands and Greece were the countries with the most population decline. The Cook Islands had the most decline out of the three.

## World population

World population has been rising since the end of the Black Death, around the year 1350.

Population began growing rapidly in the Western world during the industrial revolution. Several factors were notable: the coming of modern agriculture, and the control of epidemic diseases (black death, cholera, typhus). Modern water engineering brought clean water to many large cities. Deaths from world wars, especially WWI, reversed the trend, but only for a while.

The most significant increase in the world's population has been since the 1950s in Asia and Latin America. Medical advances, and increases in farming, have been the main causes.

A single example is both astonishing and revealing. Since 1945, half the forests of Indonesia have been replaced with farmland. As late as 1900, Indonesia was still a densely forested country: forests covered 84 percent of the total land area. Deforestation became serious in the 1970s, and has gone faster since then. About 170 million hectares (estimated in 1900) decreased to less than 100 million hectares by the end of the 20th century. In 2008, it was estimated that tropical rainforests in Indonesia would be logged out in a decade. Of the total logging in Indonesia, up to 80% is said to be done illegally.

## Related pages

* Overpopulation
* Population density

* "Agriculture, plant physiology, and human population growth: past, present, and future" (PDF). *Lincoln Taiz - Theoretical and Experimental Plant Physiology (2013), University of California*.
* YAN Kun(2011). The tendency equation of the population and its limit value in the United Kingdom (Brief annotation of the connection equation(R)), Xi'an: Xi'an Modern Nonlinear Science Applying Institute.

## Other websites

* "Agriculture and Human Population Growth". CK-12 Foundation.