Earth Science

Stars ar one of the celestial bodies open in the solar system . much(prenominal) celestial object produces heat , fire , and different forms of radiations such as x-rays and ultraviolet rays ca habituated by its cosmic energy engines All sentiences ar made up of bodge , plasma , and matters comprised of subatomic particles that are extremely heated . From the terra firma , it whitethorn appear that stars are near beca wont of their radiance glazed oer . However , stars are very far extraneous that more or less of the scientists have to develop manner actings in to calculate their pass by . Two of the most not able methods are the parallax technique and the use of Cepheid inconsistent (National Geographic , 2008The parallax technique is used in to run the outgo of the stars that are closest to the domain . Due to th e mutation of the earth to the sun , the stars that are near to the earth shifts business organization office against the stars that are in farther impersonates . These changes in the position of the close stars are known as the parallax shift . The parallax method functions by observing the distance of the shifting process and find the earth s orbit diameter . From there , astronomers are able to particularize the parallax angle of the star s distance . The main dominion bottom of the inning the method is that the lowlyer the parallax shift the farther extraneous the star is from the earth (Windows to the population group , 2000 , n .p . Such method is only applicable for stars that are within the bunk of a function of few hundred light years from earth . and so , when stars drop dead the given range , the parallax shift could be too small to be meterd through this technique (Windows to the Universe aggroup , 2000For the countless distant stars that are in the range beyond 100 light years and are in clus! ters found in a different galaxy , the measuring stick is identify through the star s property known as Cepheid variable Stars that have this property undergo a ameliorate bout where they get brighter and dimmer .

This property is common among stars that are in old age (Berger , 2002 , n .p . Because of their abundance in topographic point astronomers measure their distance by find the number of cps when stars are bright (Berger , 2002There are umteen ways to measure the distance of the stars . It may be obtained from the stars unearthly properties , temperature , brightness and brightness . Because of the major efforts in improving the measurements of the distances of the stars , unhomogeneous ways are also formulated in to specialize the cosmic distance of other celestial bodies present in the skyReferencesBerger , W . H (2002 . Measuring distance to the stars . In launching to Astronomy : countersign ofthe Field of Astronomy , University of California , San Diego . Retrieved family line 17 , 2008 from hypertext transfer protocol /earthguide .ucsd .edu /virtualmuseum /ita /06_3 .shtmlNational Geographic (2008 . Stars . Retrieved September 17 , 2008 from http /science .nationalgeographic .com /science /space /universe /stars-arti cle .htmlWindows to the Universe Team (2000 , September . How do astronomers measure thedistance...If you want to get a full essay, put up it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay