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Which of the following luminosity classes refers to stars on the main sequence?
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∙ 10y ago
The basic luminosity classes are: I for supergiants, III for giants, and V for main-sequence stars.
Wiki User
∙ 10y ago
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Which of the following stars has a surface temperature of approximately 9000 K and luminosity about 1 or 20 times greater than the Sun's luminosity?
Don't write "the following" if you don't provide a list - it doesn't make any sense.
Does apparent magnitude refer to real luminosity?
No. Apparent magnitude (or luminosity) means how bright a star (or other object) looks to us; absolute magnitude (or luminosity) refers to how bright it really is.
Where is Betelgeuse located on the H-R diagram?
Betelgeuse has a spectral type of M2lab signifying that it is a red class M star. the "lab" refers to it being an intermediate luminous supergiant. It has a luminosity of 140,000L. Referring to the H-R diagram [See related link] we can see that an M class star with a luminosity of 140,000 will appear in the very top right corner - above la supergiants.
What is the star on the main sequence?
The Main Sequence refers to the H-R diagram of stellar evolution (the Hertzsprung-Russell diagram). If a star is on the Main Sequence, then it is burning with the rate and temperature expected of its spectral class. Stars are divided into the following spectral classes on the H-R diagram: O, B, A, F, G, K, M O, B and A stars burn very hot because they are very large, and they are usually white/blue-white in color F and G stars (our sun is a G star) burn moderately, are moderate in size and give off yellow light K and M stars are red dwarfs. They burn slowly with red color, representing the coolest, least energetic spectrum of light. Stars which are off the Main Sequence but which are on the H-R diagram include Red Giants (like Betelgueuse and Antares), and white dwarfs, stages at the end of a star's life cycle which our sun will eventually pass through. More massive stars have different endings, including supernovae and black holes or neutron stars. These are not on the H-R diagram.
What type of star is hamal?
From Wikipedia: "It is estimated to be approximately twice as massive as the Sun and 15 times larger in diameter, and has around 90 times the Sun's bolometric luminosity." Bolometric refers to the total energy radiated, both visible and outside the visible portion. Check the Wikipedia article on "Hamal" for additional details about this star.
Which of the following stars has a surface temperature of approximately 9000 K and luminosity about 1 or 20 times greater than the Sun's luminosity?
Don't write "the following" if you don't provide a list - it doesn't make any sense.
Does apparent magnitude refer to real luminosity?
No. Apparent magnitude (or luminosity) means how bright a star (or other object) looks to us; absolute magnitude (or luminosity) refers to how bright it really is.
What is the difference between a star's luminosity and brightness?
The difference between apparent brightness and luminosity is that apparent brightness means that a star may appear to be bright, but only looks bright because of the relatively closeness a star is to earth. Luminosity is used by astronomers and refers to the power output of a star. Apparent Brightness means a star may appear to be very bright but only look that way because it is relatively close to Earth. Luminosity just refers to the power output of a star.
What is the difference between a star's brightness and luminosity?
The difference between apparent brightness and luminosity is that apparent brightness means that a star may appear to be bright, but only looks bright because of the relatively closeness a star is to earth. Luminosity is used by astronomers and refers to the power output of a star. Apparent Brightness means a star may appear to be very bright but only look that way because it is relatively close to Earth. Luminosity just refers to the power output of a star.
What refers to translating the sequence of nucleic acids to the sequence of amino acids?
Transcription.
The primary structure of a protein refers to?
The number and sequence of amino acids
What luminosity measure that different from what absolute visual magnitude measures?
1.Luminosity is the amount of light emitted from a certain light source whereas brightness is the amount of light manifested or received. 2.The area of illumination is inversely proportional to brightness whereas luminosity isn't. 3.Brightness is usually expressed in 'Lumens' whereas luminosity is expressed in candela per square meter (photometry).
What do changes in the DNA sequence or mutations help drive?
Evolutionary Change refers to the changes in the DNA sequence or mutations to help drive.
What is Textile Management?
It refers to managing the workers in the Textile industry,also include employment opportunities,trainee programs, guide the welfare of people working in an industry and also following proper methodology of process sequence.
Refers to an orderly sequence of genetically designed biological growth processes?
maturation
What use are colonnades in architecture?
In architecture, a colonnade is a long sequence of columns joined by their together. Colonnades are often free-standing, or part of a building.
The Army refers to the reintegration process as What?
The Army refers to the reintegration process as which of the following
