The accepted classification scheme is a combination of two, the Harvard system types stars based on surface temperature and the MK system, which types stars based on luminosity. In the 1880s, the Henry Draper catalogue of stars was being compiled at the Harvard College Observatory. During this time, more types of stars were discovered and labeled using letters of the alphabet based on hydrogen spectral line strength. Eventually, the types were listed in non-alphabetical order based on surface temperature, resulting in the O, B, A, F, G, K, M classification system. This order of stellar types ranges from O, bluish-white stars with surface temperatures from twenty-five thousand degrees Kelvin to fifty thousand degrees Kelvin, to M, red stars with surface temperatures of approximately three thousand degrees Kelvin. The Sun is a type G star (Stellar Classification, 2014).
Stars are born, evolve, and after millions or billions of years they die. Stars are formed in vast interstellar molecular clouds when gravity overpowers heat, which leads to disequilibrium in the cloud and causes contract...
... middle of paper ...
...ook (The Almagest) in 150 AD that summarized Greek astronomical knowledge. It catalogued one thousand twenty-two stars, with estimates of their brightness, arranged in the forty-eight original constellations. Ancient Greeks named stars according to their position in a constellation, for example a star in the Taurus the Bull constellation was known as “the reddish one on the southern eye”, this star’s Arabic is name is Aldebaran. In the tenth century, Al-Sufi, one of the greatest Arabic astronomers, published his version of The Almagest where he introduced the names of individual stars. Bedouin Arabs thought single stars represented people and animals, so they named them. While some of the star names in Al-Sufi’s book were translations of Ptolemy’s descriptions, many of the original meanings of the star names had long been forgotten (Constellations: FAQs, n.d.).
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- ... Andromeda is one of the farthest objects discernable to the naked eye, and the closest spiral galaxy in proximity to our very own galaxy the Milky Way. The Big Dipper is an arrangement of seven stars, the brightest that make up the constellation Ursa Major, also referred to as the Big Bear by the Dutch. Similar in appearance to a large ladle or drinking gourde, it prove quite beneficial as a navigational aid in the 19th century, as fleeing slaves would "follow the Drinking Gourd" or the two “pointer stars” at the gourde’s end.... [tags: Galaxy, Stars]
525 words (1.5 pages)
- Perhaps the simplest constellation of the four original Greek constellations is the Hyades. One of the first mentions of the Hyades is found in Works and Days by Homer, as a seasonal signal to farmers. Farmers were told “... when the... Hyades... begin to set... remember to plough...” (Hesiod 612-613). The myth is that the Hyades are believed to be the daughters of the Titan Atlas and the Oceanid Aethra and the sisters of the Pleiades (Britannica School). After nursing the god Dionysus as a baby, they were rewarded though immortality in the stars (Britannica School).... [tags: one of the four original Greek constellations]
1731 words (4.9 pages)
- Celestial bodies and literature have a relationship that extends beyond the simple “star light, star bright, I wish I may, I wish I might…” rhyme. Over the years, man has found a muse in the heavens and has used this inspiration to create to works that speak to generations of people. The Orion constellation is located on the celestial equator, and is one of the most well-known and identifiable constellations in the sky and can be seen throughout the world. Orion’s popularity has lead to its inclusion “Down fell the red skin of the lion Into the river at his feet.... [tags: constellations, orion, stars]
725 words (2.1 pages)
- Hipparcos Mira Variable Stars ABSTRACT From the visual and infrared light curves we are trying to find the phase changes and correlate them to Infrared shift and magutdes to see what is happing to Mira type stars as they age. Most of the radiation in the star is in the Infrared. The method being used O-C and fitting mean light curves. All mira variables pulsate undergoing rapid mass loss. In the conclusion we show that the magnitude has a positive correlation with the phase shift. I.Introduction Studies of Mira variables are of considerable importance in stellar astrophysics because they are pulsating stars undergoing rapid mass loss.... [tags: Astronomy Stars Space Essays]
1250 words (3.6 pages)
- Character list Annemarie is one of the main characters in this book. she is a 10 year old german girl who lives in Copenhagan, Denmark with her mom, dad, and young sister Kirsti. Annemarie tells the story from her point of view. “It was only in the fairy tales that people were called upon to be so brave, to die for one another.Not in real-life denmark” annemarie struggles to find the definition of courage, but with the big journey that awaits uphead she soon finds out. Ellen is also one of the main characters in this book , she’s also the same age as her best friend annemarie.... [tags: Number the Stars Essays]
1284 words (3.7 pages)
- While looking in the sky at night, you try to point out the different constellation you see. Most people know the major constellations, but many do not know about the constellation Delphinus. There are many scientific and literary explanations for the constellation Delphinus. There are two known myths about delphinus. The first is about Arion. Arion was a known poet and musician. He was born on the island of Lesbos. He was known for playing the lyre. This made him famous during the seventh century B.C.... [tags: Astronomy, Mythology, Science]
607 words (1.7 pages)
- Sagitta, which means “the arrow” in Latin, is a constellation that can be found from all places on Earth, excluding the Antarctic Circle, at approximately +90° and -70°. It is located in the fourth quadrant of the northern hemisphere, inside the Milky Way, and can best be seen in the months of August and September at approximately 9:00 PM. Sagitta was first discovered by the renowned Greek astronomer, Ptolemy, in the second century. It is considered “ancient,” for it is one of the oldest recognized constellations.... [tags: Greek, Mythology, Arrow]
577 words (1.6 pages)
- Analysis of The Astronomer's Wife by Kay Boyle In the "Astronomer's Wife" by Kay Boyle, something as simple as a conversation with a plumber about a stopped elbow is enough to trigger an awakening in Mrs. Katherine Ames. When Mrs. Ames realized that the plumber was talking about something she understood (the stopped elbow), she realized that her marital problems were not the result of a division betwwen the sexes; instead, she realized that some men, like the plumber, are as practical as she is, and that some other men, like her husband, scorn people like her because they are intellectually inclined.... [tags: Astronomers Wife Kay Boyle Essays Papers]
778 words (2.2 pages)
- Astronomers Wife – Just a Simple Complex Tale Kay Boyle's literary piece titled "Astronomers Wife", is a mental exercise. Every word and every line has an important meaning to it. Interpretation is a critical skill in understanding everything Boyle's story has to offer. Although this piece has a lot of sophistication to it, the story line is rather simple. The time period is the early 1900's and the story is regarding a rather young husband and a wife, in there late twenties to mid thirties.... [tags: Astronomers Wife Essays]
2694 words (7.7 pages)
- Observing Stars Our view of the sky at night is possible because of the emission and reflection of light. 'Light' is the better-known term for the electromagnetic spectrum, which includes waves in the visible, ultra-violet, infra-red, microwave, radio, X-ray and gamma-ray regions. The scale of the spectrum is so large that no region is distinct, several overlap each other. Each of these regions in the electromagnetic spectrum represent transverse waves, travelling as electrical and magnetic fields which interact perpendicularly to each other, with different ranges of wavelength.... [tags: essays research papers fc]
2781 words (7.9 pages)