Some white dwarf stars slow down their cooling process and turn into crystals. Credit: NASA
The sky is filled with stars turning into crystals - daily short science news

A new study provides the first direct evidence that white dwarf stars solidify and turn into crystals. White dwarfs are the dead remnants of stars like our Sun and they have a core of solid oxygen and carbon.

The researchers identified an excess in the number of stars at specific colors and luminosities that do not correspond to any single mass or age as evidence that white dwarfs crystallize, or transition from liquid to solid. Moreover, they estimate there are thousands of such stars within around 300 light years from Earth.

Interestingly, this means that some of the stars are much older than previously thought, in some cases by billions of years. It is estimated that our own sun will become a crystal white dwarf in about 10 billion years.

Read the full story: University of Warwick
Scientific publication: Nature