Using the European Southern Observatory's large telescope based in Chile, researchers studied a white dwarf star located about 63 light-years from Earth.

A light year is the distance that light travels in a year, amounting to 5.9 trillion kilometers.

Like this type of star, this star is incredibly dense, as it contains about 70 percent of the Sun's mass in an Earth-sized body.

It seems that the fate of stars with a mass of up to 8 times the mass of the Sun in our solar system will end up becoming white dwarfs.

Eventually these stars burn up all the hydrogen they use as fuel.

Gravity then causes the stars to collapse and blow off their outer layers in a stage known as a red giant, eventually leaving a compact core – a white dwarf.

Astronomers have proven that white dwarf stars swallow parts of planets and moons, as well as asteroids.

In the new study, researchers discovered for the first time a sign of this process. They discovered a scar on the surface of the white dwarf made up of metallic elements from a planetary or asteroid fragment that had been swallowed or accumulated, in scientific terms, after being pulled in by the star's magnetic field.

The researchers were surprised by this discovery, after they suspected that the debris had mixed with the rest of the material on the surface of the white dwarf.

 "We didn't think the magnetic field could prevent the mixing of the material accreted on the surface of the star," said astronomer Stefano Pagnolo of Armagh Observatory and Planetarium in Northern Ireland, the lead author of the study published Monday in the Astrophysical Journal Letters. A cup of water, all the water becomes sweet," according to Reuters.

It was not clear what type of object left behind the scar, which included iron, nickel, titanium, chromium, magnesium and other elements.

"This planetary snack was at least as massive as Vesta, the second-largest asteroid in our solar system," said Guy Farrehy, an astronomer at University College London and co-author of the study.

Vesta is a rocky body in the main asteroid belt of our solar system and has a diameter of about 530 kilometers.

"Planetary systems are born with their star, and they all condense from a cloud of dust and gas. We often call the star 'the mother,' so this is a bit like a mother eating her children," Friehe added.

This white dwarf began its life as a star with a mass approximately twice the mass of the Sun, and lived for up to 1.2 billion years before entering the stage of death.

Many white dwarfs have a debris disk orbiting them, the remains of a planetary system.

This material gradually falls to the surface of the star.