Milky way

Etymology and beliefs

There are many creation myths around the world which explain the origin of the Milky Way and give it its name. The English phrase is a translation from Ancient Greek Γαλαξίας, Galaxias, which is derived from the word for milk (γάλα, gala). This is also the origin of the word galaxy. In Greek myth, the Milky Way was caused by milk spilt by Hera when suckling Heracles.

Slovene has a peculiar expression Rimska cesta (The Roman Road) for the Milky Way, which is not attested in any other language. The name is derived from an old notion that the pilgrims followed it when travelling to Rome.

In Sanskrit and several other Indo-Aryan languages, the Milky Way is called Akash Ganga (आकाशगंगा, Ganges of the heavens).[59] The milky way is held to be sacred in the Hindu scriptures known as the Puranas, and the Ganges and the milky way are considered to be terrestrial-celestial analogs of each other.[59][60] However, the term Kshira (क्षीर, milk) is also used as an alternative name for the milky way in Hindu texts.[61]

In a large area from Central Asia to Africa, the name for the Milky Way is related to the word for "straw". This may have originated in ancient Armenian mythology, (Յարդ զողի Ճանապարհ hard goghi chanaparh, or "Trail of the Straw Thief"), and been carried abroad by Arabs.[62] In several Uralic, Turkic languages, Finno-Ugric languages and in the Baltic languages the Milky Way is called the "Birds' Path" (Linnunrata in Finnish), since the route of the migratory birds appear to follow the Milky Way. (The Qi Xi legend celebrated in many Asian cultures references a seasonal bridge across the Milky Way formed by birds, usually magpies or crows.) The Chinese name "Silver River" (銀河) is used throughout East Asia, including Korea and Japan. An alternative name for the Milky Way in ancient China, especially in poems, is "Heavenly Han River"(天汉). In Japanese, "Silver River" (銀河 ginga) means galaxies in general and the Milky Way is called the "Silver River System" (銀河系 gingakei) or the "River of Heaven" (天の川 Amanokawa or Amanogawa). In Swedish, it is called Vintergatan, or "Winter Avenue", because the stars in the belt were used to predict when winter would arrive.[citation needed] In some of the Iberian languages, the Milky Way's name translates as the "Road of Saint James" (e.g., in Spanish it is sometimes called "El camino de Santiago").

Quasars

A quasi-stellar radio source ("quasar") is a very energetic and distant galaxy with an active galactic nucleus. They are the most luminous objects in the universe. Quasars were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than extended sources similar to galaxies.

While there was initially some controversy over the nature of these objects—as recently as the early 1980s, there was no clear consensus as to their nature—there is now a scientific consensus that a quasar is a compact region in the center of a massive galaxy surrounding the central super massive black hole. Its size is 10–10,000 times the Schwarzschild radius of the black hole. The quasar is powered by an accretion disc around the black hole.

MaJor mAjor important cOntributions in the 20th century

Different inventions were discover during 20th century, but for me the most important is the discoveries of home appliance.The number and types of home appliances increased dramatically due to advancements in technology, electricity availability, and increases in wealth and leisure time. Such basic appliances as washing machines, clothes dryers, furnaces, exercise machines, refrigerators, freezers, electric stoves, and vacuum cleaners all became popular from the 1920s through the 1950s. The microwave oven became popular during the 1980s. Radios were popularized as a form of entertainment during the 1920s, which extended to television during the 1950s. Cable television spread rapidly during the 1980s. Personal computers began to enter the home during the 1970s-1980s as well. The age of the portable music player grew during the 1960s with the development of 8-track and cassette tapes, which slowly began to replace record players. These were in turn replaced by the CD during the late 1980s and 1990s. The proliferation of the Internet in the mid-to-late 1990s made digital distribution of music (mp3s) possible. VCRs were popularized in the 1970s, but by the end of the millennium, DVDs were beginning to replace them. For me, these are the major major important discoveries until now.......

Why science bOom during Renaissance Period?

Renaissance also means rebirth. Different improvements happened during this period like science. But why science boom during this period? One of the major reason is because of different academies were established. In this period they are more attentive in terms of studying and discovering new things. Maybe, they learn from their mistakes before. They learn now how to use their ability in terms of discovering new important things. Because of continuous dreaming they were able to improve science.

Why Studying Science is Essential

Science is our daily life. As a future educator someday, studying science really contribute a lot. It's serves as the foundation for a better teaching career. Science is one of the important subject matter of our generation, so enough attention and time in studying this is needed especially in a biological major like me......

INDIAN SCIENCE
The Indian Civilization is about the oldest, still alive and it achieve a high level of technology of an early stage. The Science and Technology in India has something to do with ff:
- Agriculture
- India Astrology
- Zinc Metallurgy
- Mathematics
List of Indian Invention and Discoveries Atonism
- According to Democritus the term Atomos means uncuttable, or the smallest invisible particle of matter.
- Dharmakirti and Dignaga, they consider atoms to be:
1. point size
2. duration less
3. made of energy
Chandrasekhar limit and Chandrasekhar numbers.
- Discovered by the name after Subramanyan chandrasekhar, received novelty prize in physics.
Universe
- the earliest known philosophical models of the universe found in Vedas.
Indigo
- use as a dye in India
Firearms
- by the 16th century India were manufacturing a diverse variety of firearms
CHINESE SCIENCE Silk road
-an ancient trade route linking China with Rome Important Person Marco Pol0 - Venetian traveler and author, whose account of his travels and experiences in China offered Europeans a first hand view of Asian land and stimulated interests in Asian trade.
Zu Chongzhi
- 15h century mathematician who calculated "pi" to the 7th digit Liu Ju-Hsieh - mathematician who discovered Pascal's Triangle.
Tao Ch'ien
- a famous poet and philosopher who influenced the idea to discover an elixir and the science of medicine. Four Great Inventions Magnetic Compass Printing Press Gun Powder Paper Making Other Inventions Astronomy Mathematics Military Medicine

Pascal's Triangle

Pascal's triangle is a geometric arrangement of the binomial coefficients in a triangle. It is named after the French mathematician Blaise Pascal in much of the Western world, although other mathematicians studied it centuries before him in India, Persia, China, and Italy.
The rows of Pascal's triangle are conventionally enumerated starting with row 0, and the numbers in each row are usually staggered relative to the numbers in the adjacent rows. A simple construction of the triangle proceeds in the following manner. On row 0, write only the number 1. Then, to construct the elements of following rows, add the number directly above and to the left with the number directly above and to the right to find the new value. If either the number to the right or left is not present, substitute a zero in its place. For example, the first number in the first row is 0 + 1 = 1, whereas the numbers 1 and 3 in the third row are added to produce the number 4 in the fourth row.