And experienced the collapse due to the continued failure of hydrogen fusion continues (because too much hydrogen is already used). In our Sun-sized stars, this collapse and the Red Gnomies Lefse rolling team shirt onset of helium fusion and the collapse of the outer gas material, known as the giant red phase. . The remaining star core is then called the white dwarf. In stars smaller than the original Sun, they collapsed but did not burn the helium fusion; There is enough pressure to push the temperature high enough. There are also Viking’s white dwarfs. As one of the other answers pointed out, planets orbit stars.