In the atom, spontaneous (or induced) decay takes place from time to time. Two kinds of decay events are classically known. In alpha decay, the nucleus of a helium (2 protons + 2 neutrons) is ejected from the decaying atom, attended by a burst of gamma radiation.
In Beta Decay, an electron is ejected from the core, changing the element's atomic number and fundamental properties.
In Classical Nebular Theory, suggested years ago by Kant, the solar system is formed by a swirling mass of gas coalescing over time. In this view, the outer gas giants are only formed in cold regions, while inner worlds are rocky.
Recent discoveries have thrown two things into question. First, the dogma that planets' orbitals do not decay with time. Second, the proximity of a hot Jupiter to its parent star. These are known as hot owing to the fact that when they are discovered, their position, many times, is oddly too close, more than allowed for by the Nebular Hypothesis.
If one wanted to verify whether planets are birthed within their parent star, an experiment is needed. When a new planet is discovered, by analyzing star-wobble - light-dip, etc. - appearances (first time), one could also look for an attending burst of radiation. Not necessarily a gamma ray but some analogous, high frequency event detected often in the vast sky.
Fast radio Bursts (FRBs) are a form of energy in the universe which is extremely high frequency and of unknown origin. Might FRBs be the decay event attendant ?
Einstein predicted that light from distant stars when seen at the edge of the sun would appear to bend slightly.