Astronomy ch.10-11#3 Crossword
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
                                                          
 
 
Down: 2) observation of emmission of characteristic red balmer light from nebulosity around them Across: 1) pre-main sequence star3) about 150 solar masses4) the stars in cluster escape one by one until the cluster no longer exists5) strong spectral emission lines6) the temperature becomes so high that the excess mass is pushed back into space by radiation from the star?7) in which nuclear fussion reactions generate sufficient energy to oppose further condensation of the star8) after condensation but before but before nuclear reaction begin in its core9) H2, molecular hydrogen10) age11) the temperature in a contracting protostar of less than 0.08 solar mass does not become high enough for nuclear reaction to start12) The majority of the material in these stars is hydrogen13) the more massive the original star the faster is the evolution14) gravitational contraction of a hot gas cloud15) the temperature becomes so high that the excess mass is pushed back into space by radiation from the star16) right-side relatively large luminosity because of its size but cool17) a protostar18) 500,000 solar masses19) heating of an interstellar cloud by radiation from embedded young stars20) higher temperature inhibit star information21) blue22) ammonia (nh3)23) ionization and subsequent recombination of hydrogen atoms24) an extrasolar planet orbits a star; a sub brown dwarf does not otherwise they are the same25) nuclear reaction begin in its core26) amount of rotation (spin)
 

 

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