When a star's nuclear energy runs out, it dies. A star can die in many ways. A is one way a star might die, and it can trigger the beginning of a new star's life cycle. red giant, black dwarf, white dwarf, supernova.

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion