The Southern Argument for Slavery Southern slaveholders often used biblical passages to justify slavery.
What comes to mind when you look up at the night sky and spot the constellations? Is it a grand desire to explore deep into space? Is it the feeling of awe and wonder, that perhaps these shapes in the sky represent something? Or is the sense that, like countless generations of human beings who have come before you, you are staring into the heavens and seeing patterns?
If the answer to any of the above is yes, then you are in good company! While most people can name at least one constellation, very few know the story of where they came from.
Who were the first people to spot them? Where do their names come from? And just how many constellations are there in the sky? Here are a few of the answers, followed by a list of every known constellation, and all the relevant information pertaining to them. A constellation is essentially a specific area of the celestial sphere, though the term is more often associated with a chance grouping of stars in the night sky.
Technically, star groupings are known as asterisms, and the practice of locating and assigning names to them is known as asterism. This practice goes back thousands of years, possibly even to the Upper Paleolithic. In fact, archaeological studies have identified markings in the famous cave paintings at Lascaux in southern France ca.
There are currently 88 officially recognized constellations in total, which together cover the entire sky. Hence, any given point in a celestial coordinate system can unambiguously be assigned to a constellation. It is also a common practice in modern astronomy, when locating objects in the sky, to indicate which constellation their coordinates place them in proximity to, thus conveying a rough idea of where they can be found.
A more functional definition would be a recognizable pattern of stars whose appearance is associated with mythical characters, creatures, or certain characteristics. Typically, stars in a constellation have only one thing in common — they appear near each other in the sky when viewed from Earth.
In reality, these stars are often very distant from each other and only appear to line up based on their immense distance from Earth.
Since stars also travel on their own orbits through the Milky Way, the star patterns of the constellations change slowly over time. It is believed that since the earliest humans walked the Earth, the tradition of looking up at the night sky and assigning names and characters to them existed.
However, the earliest recorded evidence of asterism and constellation-naming comes to us from ancient Mesopotamia, and in the form of etchings on clay tablets that are dated to around ca. However, the ancient Babylonians were the first to recognize that astronomical phenomena are periodic and can be calculated mathematically.
It was during the middle Bronze Age ca. Star map showing the celestial globe of Su Songa Chinese scientist and mechanical engineer of the Song Dynasty Wikipedia Commons In ancient China, astronomical traditions can be traced back to the middle Shang Dynasty ca.
The parallels between these and earlier Sumerian star catalogs suggest they did no arise independently. Astronomical observations conducted in the Zhanguo period 5th century BCE were later recorded by astronomers in the Han period BCE — CEgiving rise to the single system of classic Chinese astronomy.
In India, the earliest indications of an astronomical system being developed are attributed to the Indus Valley Civilization — BCE. However, the oldest recorded example of astronomy and astrology is the Vedanga Jyotisha, a study which is part of the wider Vedic literature i.
By the 4th century BCE, the Greeks adopted the Babylonian system and added several more constellations to the mix. By the 2nd century CE, Claudius Ptolemaus aka. Ptolemy combined all 48 known constellations into a single system.
His treatise, known as the Almagestwould be used by medieval European and Islamic scholars for over a thousand years to come. Between the 8th and 15th centuries, the Islamic world experienced a burst of scientific development, reaching from the Al-Andus region modern-day Spain and Portugal to Central Asia and India.Apostles of Disunion: Southern Secession Commissioners and the Causes of the Civil War (A Nation Divided: Studies in the Civil War Era) [Charles B.
Dew] on timberdesignmag.com *FREE* shipping on qualifying offers. Charles Dew’s Apostles of Disunion has established itself as a modern classic and an indispensable account of the Southern states’ secession from the Union.
Parallels and Meridians. STUDY. PLAY. Equator. An imaginary line around the earth between the North Pole and the South Pole. Located at 0° and divides the Earth into the Northern Hemisphere and Southern Hemipshere.
Prime Meridian. This updated edition of The Tao of Physics includes a new preface and afterword in which the author reviews the developments of the twenty-five years since the book's first publication, discusses criticisms the book has received, and examines future possibilities for a new scientific world.4/5(27).
Start studying Time 4 Learning Chapter 14 The Global Address System. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The earth is closer to the Sun in the southern hemisphere when it is summer, but during summer in the northern hemisphere the earth is farther away by many millions of kilomet res.
Although this will change gradually and in 13, years the opposite will be true. timberdesignmag.com is the place to go to get the answers you need and to ask the questions you want.