Answer:
Mimo że większość pierwiastków powstaje w wyniku fuzji w jądrach gwiazd, to zaistnienie w tym procesie atomów cięższych od żelaza, takich jak stront, jest najzwyczajniej niemożliwe. Takie pierwiastki narodzić się mogą tylko w znacznie gorętszym środowisku wypełnionym o wiele większą ilością swobodnych neutronów.
Explanation:
Answer:
Light elements like hydrogen and helium formed during the big bang, and those up to iron are made by fusion in the cores of stars. Some heavier elements like gallium and bromine need something more, such as a supernova. Others—such as gold and uranium, which are the most neutron-rich—require a process called rapid neutron capture. Here, an atomic nucleus is bombarded with neutrons so it swells to an unstable size, but the whole thing happens so fast the element doesn’t have time to split apart.
Explanation:
Scientists have long suspected that neutron stars, the superdense remnants of burned out suns, are needed for this sort of rapid neutron capture. But until 2 years ago, they had never witnessed such an event. That’s when the GW170817 merger happened. Taking place 140 million light-years away (and imagined above, with strontium in yellow), astronomers first detected it from the gravitational waves generated by the stars crashing together.