 The core contracts and the temperature and pressure rises enough to fuse carbon ( see Carbon burning process ) . This process continues , with the successive stages being fueled by neon ( see neon burning process ) , oxygen ( see oxygen burning process ) , and silicon ( see silicon burning process ) . Near the end of the star 's life , fusion continues along a series of onion @-@ layer shells within a massive star . Each shell fuses a different element , with the outermost shell fusing hydrogen ; the next shell fusing helium , and so forth . 
 The core contracts and the temperature and pressure <a href='uninflect' title='1'><mark>rises</mark></a> enough to fuse carbon ( see Carbon burning process ) . This process <a href='uninflect' title='2'><mark>continues</mark></a> , with the successive stages being fueled by neon ( see neon burning process ) , oxygen ( see oxygen burning process ) , and silicon ( see silicon burning process ) . Near the end of the star <a href='null_genetive' title='3'><mark>'s</mark></a>life , fusion <a href='uninflect' title='4'><mark>continues</mark></a> along a series of onion @-@ layer <a href='uninflect' title='5'><mark>shells</mark></a> within a massive star . Each shell <a href='uninflect' title='6'><mark>fuses</mark></a> a different element , with the outermost shell fusing hydrogen ; the next shell fusing helium , and so forth . 
The core contracts and the temperature and pressure rise enough to fuse carbon ( see Carbon burning process ) . This process continue , w/ da successive stages being fueled by neon ( see neon burning process ) , oxygen ( see oxygen burnin process ) , and silicon ( see silicon burning process ) . Near tdaend of thdatar  life , fusion continue along a series of onion @-@ layer shell within a massive star . Each shell fuse a diff element , wiwhe outermost shell fusing hydrogen ; thedat shell fusing helium , and soo forth .