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Who devised the scheme of seven spectral classes for stars known mnemonically as 'Oh be a fine girl kiss me'?
Wiki User
∙ 6y ago
This is the Morgan-Keenan (MK) system, introduced in 1943 by William Morgan and Phillip Keenan.
Wiki User
∙ 6y ago
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What is a achromatic color scheme?
Just blacks, grays, and whites; no color involved.
Rhyming scheme of off to outer space tomorrow morning?
first stanza -aaab
What affect did the hubble telescope give to society?
It is a humbling experience in the grand scheme of things as we get a different view of our neighborhood.
What are the three main categories for stars?
I am not sure that you can clasify stars into just 3 main categories. However there are a number of ways you can classify stars:-In astronomy, stellar classification is a classification of stars based on their spectral characteristics (the elements in their atmospheres).Stars are also classified using the letters O, B, A, F, G, K and M ( Ostars are "blue", B "blue-white", A stars "white", F stars "yellow-white", G stars "yellow", Kstars "orange", and M stars "red")- (there are some sub classification of these)There are Secchi classes - Class1 - Class VThe Harvard classification system is a one-dimensional classification scheme based on surface temperatureThe two-dimensional Yerkes spectral classification is based on temperature and luminosityYou can also calssify stars on how far they are through their lives (protostar - main sequence - red giant - stellar reminent)You can classify stars on how massive they are or on how large they are.Stars may be classified by their heavy element abundance (metallicity), which correlates with their age and the type of galaxy in which they are found (a sort of cosmological classification). Stellar populations are categorized as I, II, and III, with each group having decreasing metal content and increasing age.
What spectral class of stars are less common?
This is more complicated than it might seem. The short answer is "M, T, or Y, depending." The coolest type in the Harvard classification system is M; red or (in late M) brown dwarfs. Class M stars have temperatures below around 3700 K. In order to further distinguish between stars at the very low end of the temperature scale, a few new classes have been proposed. In this new classification scheme, stars between 1300-2000 K are assigned type L; stars below 1300 K are assigned type T. The main reason for choosing this particular temperature is that around 1300 K the spectrum of the star changes and they begin to show evidence of methane in their atmospheres, so type T stars are also called "methane dwarfs". Finally, a hypothetical type Y has been proposed for "ammonia dwarfs", stars which show ammonia absorption lines in their spectra. There is some dispute whether or not any type Y stars have actually been found or not. Type Y stars are expected to be cooler than 600 K or so.
Did Molvi Ahmad ullah shah started the chapati scheme?
While traveling through Northern India (Agra, Delhi, Meerut, Patna and Calcutta) he devised a novel scheme known as the Chapati Scheme.
What are the element of a classification paragraph?
set,scheme,classes
What scheme was devised by the town lawyer to determine who the true wilks brothers were?
He compared the handwriting of the men to some old letters!
What is salary scheme?
The scheme is specifically devised for those employers where the number of employees are more than 15; Salary Savings Scheme provides for payment of premiums through Monthly deductions by the employer form the salary of employees. For this scheme, the additional charge of 5% of the premium usually added for the monthly mode of payments will be waived.
What is salary saving scheme?
The scheme is specifically devised for those employers where the number of employees are more than 15; Salary Savings Scheme provides for payment of premiums through Monthly deductions by the employer form the salary of employees. For this scheme, the additional charge of 5% of the premium usually added for the monthly mode of payments will be waived.
How many classes of hazardous materials are there?
In the scheme used for transport of hazardous materials there are eight (8) classes of hazardous materials.
Is it difficult to fit real organisms into any classification scheme?
It is difficult to fit real organisms into any classification scheme because these classes are constructed just for convenience.
Is it true or false that the Louis Braille system to help blind people read was invented in 1929?
False, Louis Braille devised his scheme in 1821.
Are financial seminars actually helpful in the grand scheme of business related classes?
Financial seminars can one of the most helpful business related classes. The seminars can teach various management skills that can you boost you business finances.
What is the definition of estate planning?
Simply put an estate plan is a long term scheme devised to take care of your family and assets in the event that you or your partner either need long term residential care or perhaps pass away
What is antyodaya scheme?
aim of antyodya scheme
What is a sentence using the word scheme?
The decorator did not approve of my color scheme. She said that my scheme was unworkable.
