Hertzsprung-Russell Diagram Essay, Research Paper
The Hertzsprung-Russell Diagram or, the H-R Diagram for short, is a graph which plots stars according to their temperature and absolute magnitude. This graph reveals a pattern, which in fact is quite interesting. The H-R Diagram is named for the two astronomers, Ejnar Hertzsprung and Henry Russell, who discovered this pattern of stars. These two astronomers independently discovered that comparing magnitudes and spectral class (color) of stars yielded a lot of information about them. One key purpose of the H-R diagram is to show the relationship between temperature and absolute magnitude of stars. The type of temperature measurement used is Kelvin, where the zero point is equal to -273.16 C. On the H-R Diagram, the temperature of degrees Kelvin ranges from 3,000 to 30,000. The absolute magnitude of stars on the H-R Diagram ranges from +15 to -10. Absolute magnitude is how bright stars would appear if they were positioned at 32.6 light years away from earth. On this scale, the lower the number, the brighter the star. Thus, a start with an absolute magnitude of -10 would be much brighter than a star with an absolute magnitude of +15. The two astronomers found many patterns after developing their graph. They found that 90% of stars graphed fell within a band that ran through the middle of the graph. These stars range from cool, dim, red stars at the lower right of the H-R Diagram to hot, bright, blue stars at the upper left corner of the H-R Diagram. The stars that fall into to this band are known as main-sequence stars. Stars such as the sun, and almost every start visible in the night sky fall within this band of main sequence stars. There is another group of stars which are cool and bright that appear near the upper right corner of the H-R Diagram. These stars are very large and therefore have very big surface areas. These large surface areas give off large amounts of light and this makes the stars bright. Most of these stars are known as red giants. Some are so large however that they are referred to as supergiants. Red giants have a temperature of about 3,500 degrees Kelvin and an absolute magnitude of around 0. Supergiants have a temperature of around 3,000 degrees Kelvin and an absolute magnitude of about -7. Another group of stars, which are rather small, is found near the bottom left of the H-R Diagram. These stars are known as white dwarfs. These stars are quite hot, around 20,000 degrees Kelvin. However, because of their small size, they are not very bright. A white dwarfs absolute magnitude is around +13. There is some other information that the H-R diagram can give us about stars including spectral class (color) and luminosity. The possible colors that a star can be classified under are blue, white, yellow, orange, red, brown, and black. A black star is one that is known to be completely dead. A brown star describes a star that never reached a temperature of 18 million degrees F (10,000,255 K).
Другие работы по теме:
Romeo An Juliet Essay Research Paper hi
Romeo An Juliet Essay, Research Paper hi i need an essay about a character in romeo and juliet that demonsrtated maturity. in a well developed multi pagraph essay and say why you think the character’s maturity was greater than the other characters in the play.
Oh Really Essay Research Paper Oh Reallyyou
Oh Really? Essay, Research Paper Oh Really, you think i am a lark, the dogs they run and bark, but when i say to them, shut up shut up shut up, you say to be nice to them,
Game Theory Essay Research Paper Game TheoryStrategic
Game Theory Essay, Research Paper Game Theory (Strategic Thinking in Everyday Life) Have you ever been faced with having to live with a decision you made knowing that had you taken the time to analyze the outcomes you may have made a more intelligible choice? Most likely the answer to that question was “yes”.
The Design And Development Of My Circuit
Was A Task That Merged Into One Essay, Research Paper The design and development of my circuit was a task that merged into one. This is because in order to design a circuit to follow such
Shane Essay Research Paper Sometimes I need
Shane Essay, Research Paper Sometimes, I need you more than I need air And sometimes I miss you more than I will forever, never forget the times that we have shaared. The are priceless
Poem Belong Essay Research Paper Where I
Poem: Belong Essay, Research Paper Where I belong I am weak, I am strong I will fit where I belong don’t know where it is for now but it will come, if I allow tomorrow, I start a brand new day
The Membrane Essay Research Paper The MembraneThe
The Membrane Essay, Research Paper The Membrane The membrane has a double lipid layer through which fat- soluble substances will move, by passive transport or diffusion. The molecules will only move through if they are small enough.
Poem She Sat Essay Research Paper She
Poem: She Sat Essay, Research Paper She sat… helpless in her room praying to whatever god there may be to let her call to him. could god ignore such a painful cry?
Does The Resistance Rate Depend On How
Much Constantan Wire Is In The Circuit? Essay, Research Paper Aim The aim of this experiment is to investigate or find out how the resistance of a wire is affected by different
Political Spectrum Essay Research Paper The Political
Political Spectrum Essay, Research Paper The Political Spectrum The spectrum of political attitudes is a diagram that divides political thoughts and ideologies into two parts or halves: the left and the right. From the center, moving to the left, the attitudes and ideologies grow more liberal, from liberal to radical and from liberalism to communism.
Surface Currents Essay Research Paper In the
Surface Currents Essay, Research Paper In the world?s oceans, the surface currents move the oceans? surface water. This occurs in the Atlantic, Pacific and Indian Oceans. From a diagram of these surface currents, a number of conclusions can be made about the general patterns of the surface currents. One of these conclusions includes that they go clockwise in the Northern Hemisphere and counter-clockwise in the Southern Hemisphere.
Christianity And Islam Essay Research Paper Christianity
Christianity And Islam Essay, Research Paper Christianity, Islam, Judaism February 6th This day on Febuary the sixth, was started off with slides. The first slide represents Christianity. The picture was of a group of people walking and carrying crosses walking along the path that Jesus took. The second slide was a slide of the Kabah.
Lord Of Flies Essay Research Paper The
Lord Of Flies Essay, Research Paper The theatre version of ?Lord of the Flies? based on the novel by William Golding and adapted by Nigel Williams are now being presented in the Lyric
Do Plants Need Soil To Grow Essay
, Research Paper [School] DO PLANTS NEED SOIL TO GROW? [Name] [class] Period 0 [Professor] 2/8/00 TABLE OF CONTENTS: ? Problem ? Hypothesis ? Materials Used
Assuming No Pollution Explain Why A Road
Is Only An Example Of Market Failure When It Is Congested. Essay, Research Paper Assuming no pollution, explain why a road is only an example of market failure when it is congested.
Power Flow Studies Essay Research Paper INTRODUCTION
Power Flow Studies Essay, Research Paper INTRODUCTION: Power-flow studies are of great importance in planning and designing the future expansion of power systems as well as in determining the best operation of existing systems. The principal information obtained from a power-flow study is the magnitude and phase angle of the voltage at each bus and the real and reactive power flowing in each line.
Ode To Boys Essay Research Paper We
Ode To Boys Essay, Research Paper We like them But do they like us The ones we do never fuss They don’t stop in And we wonder why We stress, we bitch We sometimes cry
Geothermal Energy 2 Essay Research Paper I
Geothermal Energy 2 Essay, Research Paper I. Overview of Geothermal Energy Geothermal energy (from the Greek words geo [earth] and therme [heat], thus ‘earth heat’ energy) is a domestic energy resource with cost, reliability, and environmental advantages over conventional energy sources. Energy from this source comes from the renewable source of heat from deep in the Earth (diagram: A).
Madness Essay Research Paper Before the module
Madness Essay, Research Paper Before the module began I had a fixed idea of what madness was. I had underestimated the complexity of the portrayal of madness and as a result of this, I was surprised by the range of texts that we explored from that particular perspective.
Dare Essay Essay Research Paper What DARE
Dare Essay Essay, Research Paper What D.A.R.E Means To Me Dare has prepared me to say no to drugs in eight different ways. If anyone asks me to do drugs I will know what to do, such as- just ignoring the person or just