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How many years do spectral class O5 stars remain on the main sequence?
Wiki User
∙ 11y ago
It all depends on the mass of the star
1exp10*(m/l) where "m" is mass and "l" is luminosity.
Will give you an approximate period of the stars life.
Wiki User
∙ 11y ago
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What is the least luminous spectral class?
Spectral class Y, which is typical of "brown dwarf" stars.
Why are there no massive O and B stars?
There are stars with spectral classes of O & B (e.g. Rigel) R136a1 is a star of the spectral class WN5h. Wolf Rayet stars have this kind of spectral type.
Two stars of the same spectral class must have the same what?
temperature
How common are sun like stars?
Our Sun has a spectral class of G (Yellow dwarf). About 1 in 13 stars, in our solar neighbourhood are within this class
Is spectral class B in space hot or cold?
Spectral class is the categorization of stars by temperature and size, mostly the former. Spectral class B is very hot. In descending order (hottest to coolest) the spectral classes are O,B,A,F,G,K,M. You can see that B is very near the top.
What is the least luminous spectral class?
Spectral class Y, which is typical of "brown dwarf" stars.
What is spectral class?
Spectral class is classification of stars by their external features..Like light,temperature etc..
What is a Subdwarf star?
A star with luminosity class VI under the Yerkes Spectral Classification System. They have luminosity 1.5 to 2 magnitudes lower than main-sequence stars of the same spectral type.
Why are there no massive O and B stars?
There are stars with spectral classes of O & B (e.g. Rigel) R136a1 is a star of the spectral class WN5h. Wolf Rayet stars have this kind of spectral type.
How can you tell if stars in a visual binary are on the main sequence?
If they are converting hydrogen to helium, then they are on the main sequence. This can be confirmed with a spectral analysis
Two stars of the same spectral class must have the same what?
temperature
What is the mass of an orange star?
Main sequence stars that appear orange are of spectral class K that are dimmer and smaller than the Sun and have masses between 45% to 80% of the Sun's mass.
How common are sun like stars?
Our Sun has a spectral class of G (Yellow dwarf). About 1 in 13 stars, in our solar neighbourhood are within this class
Most of the stars in the main sequence are to the lower right of the sun what can you conclude about the brightness of these stars and their temperatures?
Main Sequence stars can be any spectral class of star. Something that might help you in the future is when you look up a star and see its spectral class, its always followed by a roman numeral to define where the star is in its life and size and they go as follows. I-a= A hyper Giant Star I-b= A very bright Super Giant star I= A normal Super Giant star II= Bright Giant star III= Giant star IV= Sub Giant star V= Dwarf Star(which this is where most main sequence stars fall into, While a main sequence star could also be one of the classifications listed above. it just depends on its spectral class. for example the star Deneb is in its main sequence still and its classified as a hyper giant) VI= Sub Dwarfs (this is a very rare classification and are mostly used for brown dwarfs. I hope this helps mate.
Is spectral class B in space hot or cold?
Spectral class is the categorization of stars by temperature and size, mostly the former. Spectral class B is very hot. In descending order (hottest to coolest) the spectral classes are O,B,A,F,G,K,M. You can see that B is very near the top.
Does the title Main Sequence refer to the arrangement of star clusters or to that of individual stars depending on mass spectral type and luminosity?
The analysis is done for individual stars.
Is the sun a class g star?
Yes. Our Sun's classification, based on spectral class, is a main sequence G2V star. It designated as a yellow dwarf star. G2 indicates its surface temperature of approximately 5778 K (5505 °C), and V indicates that the Sun, like most stars, is a main sequence star.
