British astronauts discovered heavy metals including nickel and iron in the debris of a solar system settled on a destroyed planet. The astronauts noted that the rock remaining from the destroyed planet is 600 km long, and orbit in 123.4 minutes around its sun that burned, disappeared and then shrunk into a dwarf star. The findings are published in the latest issue of the Science American journal. The astronauts considered that this rock may help them take a closer look of the future of our solar system. When the sun-like stars run out of fuel, they dramatically expand to become a huge red star. Then, they clean out their external layer, and finally transforms into a white dwarf star.