Main sequence

the newborn star’s size, it could remain in this state for billions or possibly even trillions of years. However, not all stars remain so long in the phase of “childhood”, if you will. Stars will mature into “teenagers” also. This stage is called the main sequence. If the growing cloud has enough mass, the the gas and dust burns even hotter, eventually reaching temperatures to fuse hydrogen into helium. Fusion stabilizes the star by producing an outward pressure that balances with the inward pressure caused by gravity. How long the main sequence phase lasts depends on how massive it is. Do higher-mass stars live longer than lower-mass stars? To most people’s surprise, a higher-mass star has more material but burns through it faster due to higher core temperatures caused by greater gravitational forces. So in fact, lower-mass stars will survive longer. While the sun will spend about ten billion years on the main sequence, a star ten times as massive will stick around for only twenty million years. A red dwarf is normally half as massive as the sun and can, “last 80 to 100 billion years, which is far longer than the age of the universe” (Redd). About ninety percent of the stars in the universe, including the sun, are main sequence stars. The last stage of life—death—is the most complicated process to grasp, for both humans and stars alike. When stars with the mass of the Milky Way’s sun runs out of hydrogen fuel, it contracts under the weight of gravity. In the upper layers,…

a large globular cluster with an estimated star count between five and ten million. With a length spanning over 170 light years, this globular cluster is the largest discovered in our galaxy. The stars that comprise the cluster are so densely packed that they are separated on average by only 0.1 light years. In contrast to other globular clusters, Omega Centauri is so different that astronomers suggest the origin of the cluster is a core remnant of another galaxy that was absorbed into the…

He classified these group of stars as the main sequence, this is of which the Earth’s sun is a member of. The two astral scientists later discovered the existence of other stars of which were categorized as white dwarfs (lower left), red dwarfs (lower right), super giants (upper left), and red super giants (upper right). When Russell plotted these on the diagram, each star was represented as a dot, and the position of each dot on the diagram corresponds to the luminosity and temperature of…

The Vega has many properties and characteristics in the star. The Vega star is 25 light years away from the earth and the mass is 2.1 times bigger than the sun. It is about 455 million years old and each rotation period is 12.5 hours. The diameter is about 2.2 million miles, which is 2.5 times the Sun, the temperature is approximately 17,000 F (9,500C), the luminosity is about 40 times the Sun’s size, and the star type is is a white main sequence star, so it is in A class. Since it is a main…

wave, the star is officially born when it reaches an internal temperature of 10 million degrees Kelvin. At this pivotal temperature, the individual hydrogen protons are unable to repel each other any longer, and collide into each other forming a helium atom. This process not only forms a higher element, but also releases energy. It is this energy that we see as sunshine or light, and can feel as heat. By the time it has reached this milestone, the star has been compressed down to only 1…

“Oh, be a fine girl/guy kiss me,” or maybe not. Learning this phrase has helped multiple astronomers to educate themselves on the spectral classification of stars and continues to do so in today’s time. Annie Jump Cannon’s legacy will carry on lasting a lifetime! The first letters of each word in the phrase represents the seven main types of stars. Starting with ”‘O,” these stars are very young, blue, hot, massive and extremely bright star. This type of star is very uncommon similar to the “B”…

where spectra with the strongest lines were labeled “A” and the weakest were labeled “O”. Antonia Maury, the niece of Henry Draper and one of the women working on the project, disagreed with this system. She devised a numerical classification system of I to XXII; I through XX However, Annie Jump Cannon, noticed that Fleming’s system loosely put the stars in order of temperature, with blue being hot and red being cool. She came up with a classification system using Fleming’s alphabetized…

Learning a second language is a complex process that exceeds the acquisition of its structure and vocabulary. One of the major components of mastering a new language requires learners to become familiar and sensitive to the preference in language use by native speakers of certain sequences of words over others (Wray, 2000). It is the mastery of these word sequences that distinguishes novice from proficient L2 learners. Yet, there is still little agreement across studies on the number of words…

The first negative aspect to the world of GATTACA would be that those chosen to be one’s partner seemed to be solely based on the other person’s genetic sequence and their “ranking.” When Irene goes to sequence Jerome’s (Vincent’s) hair and gets the sequence back, the person working at the sequencing booth tells her that Jerome’s “rating” is a 9.3 and that he is “quite the catch.” By saying this, combined with the public sequencing booths, the world of GATTACA is one that is based on genes and…

During the week of the audit, many order selectors were observed performing tasks above and beyond those stated in the company’s documented preferred methods and those considered and allocated in the engineered labor standards resulting in inaccurate and understated performances achieved against standard. For example, observed were labeling of cases after placement to the pallet and traveling out of sequence to obtain base items of multiple cases. The specified methods and engineered standards…