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Who Discovered the Four Moons of Saturn?

Who Discovered the Four Moons of Saturn?
One of the major planets in the Solar System, Saturn is comprised of 61 moons. It is popular for its four visible moons, namely Telesto, Prometheus, Dione and Titan. Aside from these, this planet also has hundreds of moonlets. In addition to these highly interesting details, it is also good to know certain information regarding its history including who discovered the four moons of Saturn. The Discovery of the Four Moons of Saturn Who discovered the four moons of Saturn? The first moon is Titan, which was discovered by Dutch astronomer Christiaan Huygens on March 25, 1655. The second one is Dione, which was discovered by Italian/French astrologer Giovanni Cassini in 1684. The third moon is called Prometheus, which was named after a powerful deity in Greek mythology. Stewart A. Collins discovered it sometime in October 1980. The fourth moon is named Telesto, which was named after a Greek mythological character. On April 8, 1980, astronomers John W. Fountain, Stephen M. Larson, Harold J....

Who Discovered the Atom?

Who Discovered the Atom?
The facts about the atom’s discovery are not easy to explain. John Dalton (late 1700s) was the first to perform experiments that determined atomic weight. But the ancients had already postulated its existence, though they weren’t able to prove it. The Idea of the Atom The concept of matter being made up smaller particles that couldn’t be divided goes back to ancient India in 6th century BCE. The idea of atoms was also recognized by the Greeks. In 450 BC, Democritius wrote that all matter was composed of particles that could not be cut. However, these theories were based on philosophy. The facts about the atom would not emerge until the 1600s when scientific instruments began to be invented. It began with Robert Boyle in 1661. He stated that matter was comprised of small particles and not the four elements. Antoine Lavoisier was the one who proposed that the atom could not be divided by methods used in chemistry. It was Dalton however, who relied on experiments to prove their existence. In...

Who Discovered Multiple Sclerosis?

Who Discovered Multiple Sclerosis?
An autoimmune disease that affects the central nervous system, specifically the spinal cord and the brain, multiple sclerosis inflict insurmountable amount of suffering and pain to patients. Patients usually experience demyelination, a condition wherein there is damage to the myelin sheath of neurons. Aside from knowing its symptoms, risk factors and treatments, it is also good to know things about the history of this disease including who discovered multiple sclerosis. The Discovery of Multiple Sclerosis Who discovered multiple sclerosis? French neurologist Jean-Martin Charcot was the very first one to describe this medical condition some time in 1868. Because of his numerous contributions to the world of science, he was considered the founder of modern neurology. Aside from neurology, he also contributed a lot to the field of psychology. Additional Facts and Other Important Details The U.S. National Multiple Sclerosis Society defined four subtypes of multiple sclerosis in 1996, namely...

Who Discovered the Leo Constellation?

Who Discovered the Leo Constellation?
Introduction Leo is one of the twelve constellations of the zodiac. It comes after Cancer and before Virgo. Leo’s symbol is a lion’s tail. It is ruled by the sun. People born between July 24 and August 23 are said by tropical astrologers to be Leos. Due to the precession of the equinoxes, sidereal astrology places Leo from August 16 to September 15. Discovery and History of the Constellation Leo Man discovered the Leo constellation early. It was known to the Sumerians and Egyptians who may have passed on their knowledge to the Romans, Greeks and Persians. In 1799, Napoleon’s army discovered a medallion called the Dandera Zodiac in the temple of Isis, in Dandera. This medallion dates from 100 BC and shows the constellations and asterisms known to the Egyptians at the time. Leo was listed in the catalogue. Pliny claimed that the Egyptians worshipped Leo because the Nile River rose when the Sun was in that sign. Leo was certainly important in Egyptian astronomy, culture and religion....

Who Discovered the Element Lithium?

Who Discovered the Element Lithium?
Represented by the atomic number 3 and symbol Li in the periodic table, lithium is described as a silver-white and soft metal. It is one of the alkali metals, which is generally considered the lightest amongst the various kinds of metals. Likewise, it is also the least dense amongst the different solid elements. More than anything else, it is known for its important uses in the fields of medicine, electronics and general engineering. The Discovery of Lithium Who discovered the element lithium? In 1817, a Swedish chemist named Johan August Arfwedson became the very first person to discover this chemical element. The result came from his analysis of a petalite ore. Before that, a Brazilian scientist named Jose Bonifacio de Andrade e Silva discovered lithium aluminum silicate or petalite in 1800. This finding was instrumental, particularly in the discovery of lithium. Swedish chemist Jons Jakob Berzelius named it ‘lithos,’ which later on was standardized as lithium. Additional Facts and...