Physics
Star Spectra Gizmo Unusual stars Observe the spectra of... Star Spectra Gizmo Unusual stars Observe the spectra of stars 5- 10. Identify the elements in each spectrum, and try to classify each star. If you notice unusual features in these spectra, describe themMatch : Write the number of the star or object that matches each description. Then use this information to help you identify the elements and reclassify the stars in the table above.____ High atmospheric pressures in a star cause spectral lines to be broadened, or "smeared out." Giant stars , which have relatively low atmospheric pressures, are characterized by narrow spectral lines.____ If a star is moving away from an observer, spectral lines are redshifted , or shifted toward the red end of the spectrum. An approaching star is blueshifted____A star orbited by a large planet will move in a small circle. This will cause its spectrum to be slightly redshifted part of the time and blueshift ed at other times.____Binary stars are pairs of stars that orbit one another. Their presence is indicated by two spectra that shift in opposite directions. ____ Cepheid variable stars change their brightness in a regular cycle. Gas pressure builds up, causing the stars to expand quickly. When the pressure is released, the star contracts, and the intensity of some spectral lines may decrease.____A nebula is an enormous cloud of gas and dust in which stars are born. Most nebulae produce an emission spectrum which is characterized by bright lines of color against a dark background. The bright lines in an emission spectrum correspond to the dark lines in an absorption spectrum.