Earth
Earth and the other planets formed about 4.6 billion years ago. Their origin was quite different from that of the Sun. The Sun was formed almost entirely of hydrogen, while the planets were formed mostly from higher elements. The smaller "rocky" planets are made almost entirely of higher elements. The Sun must have moved through areas where supernovae had previously exploded. All the planets have higher elements which are only made in supernovae. Only the so-called "gas giants" have much hydrogen and helium.