The planets, transformed from their stars into nuclei, can form a circle with the star that destroyed them and create rare wave rays. When some stars reach the end of their life span, they can expand and burn all nearby planets, making them metal nuclei orbiting them, before they become white dwarfs.
The white dwarf and surrounding planets can form a circle and emit radio waves, where radiation from the circle can be captured by radio telescopes on Earth.
"We believe that our opportunities to make exciting discoveries are very good," said lead researcher Dmitry Ferras of Warwick University.
Scientists need to know how long nuclei survive after stripping their outer layers, although studies have found that nuclei (in some cases) can last up to a billion years.
That is why future discoveries can give us more precise information about how our planet will descend in the future.