Fahrenheit & Celsius (#57/#56)

Fahrenheit

Daniel Gabriel Fahrenheit was born on May 24, 1686 in Danzig in the Polish-Lithuanian Commonwealth. Fahrenheit came from a family of merchants, but in 1701, both of Fahrenheit's parents died from eating poisonous mushrooms. After this, Fahrenheit moved to Amsterdam to begin training to become a merchant himself.

While in Amsterdam, Fahrenheit became interested in natural science and began studying and experimenting in the field. Fahrenheit also began to travel throughout Northern and Central Europe. While travelling, Fahrenheit met many notable members of the scientific and Enlightenment communities, including Gottfried Leibniz, co-developer of infinitesimal calculus, and Ole Romer, who made the first quantitative measurements of the speed of light.

In 1717, Fahrenheit settled in The Hague as a glassblower who specialized in making barometers, altimeters, and thermometers. Fahrenheit also lectured in chemistry in Amsterdam. In 1724, Fahrenheit created a scale to record temperature based on three points. These three points were the lowest point on the thermometer, or 0 Fahrenheit (F), the freezing point of water, or 32 F, and body temperature, which he calculated to be 96 F. The system was later changed so that the difference between the freezing and boiling points of water was exactly 180 F. 

Celsius

Anders Celsius was born on November 27, 1701 in Uppsala, Sweden. Unlike Fahrenheit, Celsius came from a family of scientists. Celsius's father and maternal grandfather were astronomers, and Celsius's paternal grandfather was a mathematician. Celsius studied at the Uppsala University and in 1730, Celsius became a professor there.

Celsius published many works in several fields of study. In one study conducted, he was the first to suggest that there was a connection between the appearance of the aurora borealis and changes in the magnetic field of the Earth, which was later proved to be correct. He also was part of the 1736 expedition to Lapland to measure the length of a degree along the meridian. This expedition, when compared to similar measurements from Peru, proved Isaac Newton's theory that the Earth was ellipsoid, rather than completely round, and flattened at the poles. Celsius was also one of the first people to measure the magnitude, or brightness, of certain stars, and, even with the equipment he used, Celsius was quite accurate.

Celsius is most famous for his creation of the temperature system that was named after him. Celsius understood that the boiling point of liquids was not simply dependent on heat but on pressure as well, so using a standard pressure (the pressure at sea-level), Celsius created a thermometer. At the standard pressure, the thermometer would read 100 Celsius (C) at water's melting point and 0 C at its boiling point. A year after his death, the system was reversed so the 0 C would be freezing and 100 C would be boiling.

The End

Fahrenheit died in The Hague on September 16, 1736 and is buried there at Cloister Church. Celsius died on April 25, 1744 of tuberculosis soon after co-founding the Royal Swedish Academy of Sciences. Fahrenheit's system of temperature measurement was widely accepted throughout the world and is still used by the general population of the United States, Belize, and in parts of the United Kingdom and Canada. Celsius's system, when published, replaced Fahrenheit's system in all but the above stated regions. The Celsius system has also become the standard measurement system for the majority of scientific studies, and the Kelvin System is based off of that of Celsius. Fahrenheit and Celsius are on our list because they create the first systems to measure temperature without just say "It's cold." or "It's hot."

Philo Farnsworth (#85)

Philo Farnsworth

Background

Philo Taylor Farnsworth was born on August 19, 1906 to a family living in Beaver, Utah. In 1918, the Farnsworth family moved to a farm in Rigby, Idaho. The house that they moved into was wired for electricity. Philo study the mechanical and electrical technology of the house and was soon able to fix the Delco generator that ran the house's farming equipment. He also was able to fix a discarded electric motor and use it to turn the family's hand-powered washing machine into an electrical washing machine. When he was in high school, Farnsworth came to his science teacher with ideas of an electronic television system, covering several blackboards with his diagrams. In 1922, when the Farnsworths moved to Provo, Utah, Philo stayed behind to work at a railway company so he could pay for classes at Brigham Young University. He came to live with his family again in 1923.

School and Early Career

In 1924, Farnsworth applied for the U.S. Naval Academy, where he was recruited when he got the second highest score in the nation on the academy tests. He left soon afterwards, though, when he learned that the government would own any patents Farnsworth earned. Farnsworth went back to Utah to help care for his family after his father's death. The family moved into a duplex with the family's friends, the Gardners. Cliff Gardner shared Farnsworth's interest in electronics and the two started up a radio repair business. After the business failed, Farnsworth met Leslie Gorrell and George Everson, who helped Farnsworth to fund his experiments on televisions. Farnsworth was able to get a laboratory in Los Angeles, but married Cliff Gardner's sister, Elma Gardner, before he left.

Electric Television

After moving to Los Angeles, Farnsworth applied for a patent on his designs. At the time, almost all television systems used at least some mechanical components. Farnsworth, instead, attempted to create a completely electronic television system. In 1927, Farnsworth finished his image dissector and transmitted a single straight line with it. By 1929, Farnsworth changed the design to not rely on a motor generator. THis made his system the first all-electronic television system.The other major innovator in the field of elctric televison was Vladmir Zworykin. In 1928, Farnsworth had lost two interference claims to Zworykin, but Zworykin was still unable to make it work properly. In 1930, Zworykin was hired by RCA, the leader in television development. In 1931, RCA attempted to buy Farnsworth's patents and hire Farnsworth in the process, but Farnsworth refused and went to work with the Philco company instead. RCA later filed an interference suit against Farnsworth, stating that Zworykin's 1923 patent had priority over Farnsworth's design. Farnsworth won the legal battle and a subsequent appeal by RCA, but a variety of issues led to a delay in RCA's payment of royalties to Farnsworth.  In 1932, Farnsworth met John Baird, who had given the world's first public demonstration of a working television system. Farnsworth and Baird worked together to compete with EMI to create the U.K. standard television system. When BBC chose the EMI system, Farnsworth returned to America. 

Later Work in Television and Science

In 1933, Farnsworth was let go from Philco and returned to his lab. Farnsworth worked with the University of Pennsylvania to create a method of sterilizing milk with radio waves. He also invented a fog-penetrating light beam for boats. In 1938, Farnsworth established the Farnsworth Television and Radio Corporation, and a year later, RCA finally agreed to pay Farnsworth one million dollars to license Farnsworth's 1927 Television patent. ITT, or International Telephone and Telegraph, bought Farnsworth Television and Radio in 1951. Farnsworth, at this company, worked to create a defense early warning system, submarine detection devices, radar calibration equipment, and infrared telescopes. Farnsworth also did work on nuclear fusion with ITT, Philo T. Farnsworth Associates (PTFA), and NASA. 

The End

PTFA lost funding for fusion research in 1970. A year later, Farnsworth caught pneumonia, dying on March 11, 1971. Farnsworth is on our list of important people because he invented the television that we know today. He also worked in many areas of science, creating the world we know today. He also predicted and started research on ideas that would later come true, including high-definition television and flat-screen television.

Neil Armstrong (#90)

Background

Neil Alden Armstrong was born on August 5, 1930 in Wapakoneta, Ohio. He was the eldest of the three children of Stephen Armstrong and Viola Engel. Stephen Armstrong served as an auditor for Ohio's government and the family was constantly moving around the state during Neil's childhood. In 1936, when Neil was only 6 years old, he had his first plane ride in a Ford Trimotor. As a child, Neil Armstrong became a Boy Scout, eventually acheiving the rank of Eagle Scout. In 1947, Armstrong studied aeronautical engineering at Purdue University. In 1949, the Navy called up Armstrong and sent him to the Naval Air Station Pensacola. In 1950, Armstrong became a fully qualified Naval Aviator. A year later, Armstrong went into combat in the Korean War, where he earned the Air Medal, a Gold Star, the Korean Service Medal, and the Engagement Star. Armstrong left the Navy in 1952 and went back to Purdue to finish his degree. While at Purdue, Armstrong met Janet Elizabeth Shearon, to whom he would get married to in 1956. The couple would have three children together.

Pilot

After Armstrong graduated from Purdue in 1955, he became a test pilot in the Lewis Flight Propulsion Laboratory. Armstrong flew several types of planes, and by 1957, he started flying rocket planes. He soon became involved in flying X-15, logging 2,400 flying hours before he retired as a test pilot.  Armstrong became part of the Man in Space Soonest program in 1958. In 1960, he became further involved in space travel when he became a pilot consultant for the X-20 Dyna-Soar military space plane and later became one of the six pilots to fly the plane when finished. In 1962, Armstrong also applied for a position as a potential NASA astronaut and was quickly brought into the program. Armstrong became involved in the Gemini program and was assigned as the Command Pilot of Gemini 8. He also was the backup pilot for Gemini 11.

Apollo 11

In 1968, Armstrong was named as the head of the Apollo 11 mission to the moon. He would be flying to the moon with Buzz Aldrin and Michael Collins. The three left for the moon on July 16, 1969, arriving on the moon four days later. Armstrong and Aldrin took the landing ship. Eagle, down to to the moon's surface. Armstrong's step onto the moon made him the first man to walk on the moon. It was here that Armstrong said "That's one small step for [a] man, one giant leap for mankind." Armstrong and Aldrin spent about two and a half hours on the moon, during which they tested human capabilities on the moon, planted the American Flag, left memorial items to deceased cosmonauts and astronauts, and had a minute and a half long phone call with Richard Nixon.

After Apollo

After coming beck to Earth, Armstrong announced that he would no longer fly anymore space missions. He took up a teaching position at NASA and later at the University of Cincinnati. He also served during several NASA accident investigations. Armstrong rarely made public appearances, though he did do several television commercials, and he refused to give out autographs. Armstrong had several health problems during his later life, including having the tip of his ring finger ripped off, though he had it surgically reattached. 

The End

Armstrong died after undergoing surgery to relieve blocked coronary arteries. He died on August 25th of that year due to post-surgical complications. Neil Armstrong is on our list because his actions on the moon led the world into a new era and changed the size of the world where humans could go. Armstrong's accomplishment on the moon really was one giant step for mankind.

Ptolemy (#110)

Background

Claudius Ptolemy was a Roman citizen born around the year AD 90, and he lived in Egypt under Roman rule. Ethnically, Ptolemy was Greek, and all of Ptolemy's works were written in Ancient Greek.

Life and Work

One of Ptolemy's most important surviving works is the Almagest, which is the only surviving comprehensive ancient document on astronomy. Using Babylonian astronomical data and Greek mathematics, Ptolemy created tables to predict the positions of planets in the future and the past. Also, Ptolemy created a star catalog, including forty-eight constellations. One of the key problems in Ptolemy's work was the idea of a geocentric universe, where everything revolved around the Earth. He explained the back-and-forth movement of planets by stating that the planets had sub-orbits within their larger orbit around the Earth. Because it was one of the few astronomical documents to survive into the Middle Ages, it was considered the law on astronomy during that time, and his geocentric ideas were not disproved until Nicolaus Copernicus wrote De revolutionibus in 1543. Ptolemy also wrote Planetary Hypotheses, which used his planetary model to compute the dimensions of the Solar System. Ptolemy also wrote Geographia, a work which mapped out the known world. His maps goes from Cape Verdes in the West to the middle of china in the East, and is fairly accurate considering the time this map was made. Ptolemy knew that his map only covered a quarter of the globe, but his map was still used widely up through the Middle ages. Ptolemy also wrote on astrology, where he predicted the future of people while also taking into account differences in race, country, and upbringing. Ptolemy is also remembered through his works Harmonics, where he argued that musical intervals should be based on mathematical ratios, and Optics, in which Ptolemy wrote on the properties of light, reflection, refraction, and color.

The End

Ptolemy died around the year AD 168. Ptolemy is listed on this list before Copernicus because not only did he work in more fields, but also because Ptolemy's works helped for the scientific basis for Europe in the Middle Ages, where they turned into a legend, calling him Ptolemy, King of Alexandria. Copernicus wasn't called the King of  Krakow. Also, Ptolemy has two craters (one on the Moon and one on Mars) named after him.

Pliny the Elder (#112)

Beginnings

Gaius Plinius Secundus, or Pliny the Elder, was born in the year 23A.D. He was the son of an equestrian born in Como. He came from the Plinii family, but made his own family name, Secundus.

Life

Pliny entered the army in 46 A.D. at the age of 23. Pliny, during his army work, helped to defeat the Germanic Chauci tribe, and helped construct the canal between the Maas and the Rhine. While in the army, Pliny began studying missile use on horseback.  By 56 A.D., Pliny's service was up, but did not leave the army.  Pliny lived in Rome soon after the Great Fire, and remembers the building of Nero's great palace. Pliny did not personally know Nero, but in his later career as a soldier, Pliny took orders from emperor Vespasian and rode in the army with future emperor Titus. Pliny continued to study nature, observing a solar eclipse in Campania in 59 A.D. As a senior officer in the army in 69 A.D., Pliny was sent to Africa, where he spent time studying poisonous frogs. While working in Hispania from 70-72 A.D., Pliny learned agricultural techniques and studied gold mining methods. Pliny used this information for his books, which he began to write in 69 A.D., the year that Nero's oppressive reign ended. Pliny was wrote about many different topics, creating works that are closer to encyclopedias than to anything else. Though Pliny wrote on history and conspiracy, his most famous works are those on natural history. Pliny's last book is called Naturalis Historia, which is an encyclopedia of the knowledge Pliny gained over his life. The book covers the subjects of botany, zoology, astronomy, geology, mineralogy, and technology. Much of what Pliny wrote about has been confirmed through archaeological finds, and the book remains one of the most important surviving written works of the Roman Empire.

The End

Much of what we know about Pliny the Elder was recorded by his nephew, Pliny the Younger. Among these facts is an account of Pliny the Elder's death. Pliny, in August of 79 A.D., was stationed in Misenum, across the Bay of Naples from Mount Vesuvius, which loomed over Pompeii and Herculaneum. When Vesuvius erupted, Pliny was preparing to observe the volcano more closely when he received word from a friend asking for rescue from Herculaneum. As Pliny's galley's reached Herculaneum, pumice and cinders began to fall. On the beach of Herculaneum, Pliny's men helped to save quite a few people, though in the process, Pliny became weak and couldn't walk without help. Eventually, Pliny died. Most believe that Pliny died due to the combination of toxic volcanic gases and the asthma that Pliny suffered from. Pliny is on our list because not only was he alive for the reign of several of the most famous empires and witnessed the eruption of Pompeii, but because Pliny the Elder was a brilliant naturalist, scientist, and writer, gaining fame not only in his time period, but in our time period as well.

Nicolaus Copernicus (#115)

Young Life and College

Nicolaus Copernicus was born on February 19, 1473 in Poland from two merchant families. He was the youngest of four children. At first, while being supported by his uncle, Copernicus studied at the University of Krakow in 1491, where he attained the mathematical and astronomical skill for his later achievements. He also was able to study the natural-science writings of Aristotle and Averroes while studying in Krakow.  In 1495, Copernicus left Krakow because of his uncle Watzenrode wanted him to study law in Italy, hoping for Copernicus to join the Warmia canonry, which Watzenrode was the Prince-Bishop of. In 1497, Copernicus registered in the Bologna University of Jurists. In Bologna, Copernicus studied law, the humanities, and astronomy. He became the assistant of astronomer Domenci Maria Novara da Ferrara. Under Ferrara, he began to find peculiarities in Ptolemy's geocentric universe theory based on observations of the star Aldebaran. Copernicus moved to Rome in 1500, where he continued his astronomical studies. Copernicus also went to the University of Padua, where he studied medicine, which include astrology. Over his education, Copernicus learned Latin, Greek, German, and Italian along with his native Polish.

Work

Copernicus, after his studies, became his uncle's secretary and physician in Heilsberg. He took part in almost all of his uncles political, administrative, and economic activities. This is where Copernicus began work on his heliocentric theory. Copernicus also made trips on business from his uncle. In 1510, Copernicus ended work for his uncle, and worked as a translator of Greek and Latin texts. In 1514, the first outline of the heliocentric world was written. Throughout his life, Copernicus worked as a assistant to politicians and religious leaders while continuing to study astronomy. By 1532, his manuscript on heliocentrism was basically complete, but he resisted publishing due to fears of scorn. His book, De revolutionibus orbium coelestium, was published under Georg Rheticus, who had published other works of Copernicus. Along with Andreas Osiander, Rheticus worked to have the book published in 1542.

The End

Legend has it that the first copy of De revolutionibus ever printed was placed in Copernicus's hand on May 24, 1543, the day that Copernicus died. Copernicus makes our list for being one of the few people in the world who changed the world's mind. Before him, the common theory was that everything orbited the Earth. Copernicus proved them all wrong. He changed the way people looked at the world, and not many people can do that.