An international team of astronomers, led by Australia’s Swinburne University of Technology professor Matthew Bailes, has discovered a planet made of diamond crystals, in our own Milky Way galaxy.The planet is relatively small at around 60,000 km in diameter (still, it’s five times the size of Earth). But despite its diminutive stature, this crystal space rock has more mass than the solar system’s gas giant Jupiter.
Radio telescope data shows that it orbits its star at a distance of 600,000 km, making years on planet diamond just two hours long. Any closer and it would be ripped to shreds by the star’s gravitational tug. Putting together its immense mass and close orbit, researchers can reveal the planet’s unique makeup.
It’s “likely to be largely carbon and oxygen,” said Michael Keith, one of the research team members, in a press release. Lighter elements, “like hydrogen and helium would be too big to fit the measured orbiting times”. The object’s density means that the material is certain to be crystalline, meaning a large part of the planet may be similar to a diamond.