Astronomers discover cool ‘diamond’ in the sky

An American telescope has detected a white dwarf star with a diamond core that could be the coldest of its kind ever discovered.

The temperature of the white dwarf, which is 900 light years away from Earth and 11 billion years old, is around 2,700C. This relatively low temperature caused the star’s carbon core to crystallise, effectively forming a diamond the size of Earth.

Researchers led by Professor David Kaplan from the University of Wisconsin-Milwaukee were able to locate the star and calculate its mass because its companion, a pulsar named PSR J2222-0137, spins around the white dwarf more than 30 times each second.

Read more at University of Wisconsin-Milwaukee