A team of American astronomers have captured what appears to be the formation of a new planetary system, providing a vital clue to the Earth's own deep, dark history.
Led by Colorado University's Meredith MacGregor, the team imaged nearby star HD 53143 with millimetre wavelengths, using the Atacama Large Millimeter/submillimeter Array (Alma), a collection of 66 radio telescopes in the Atacama Desert of northern Chile.
The results were unlike anything they expected, with calculations showing a sophisticated face-on debris disk circling the star – the most complicated of its kind ever observed.
"Until now, scientists had never seen a debris disk with such a complicated structure," said Prof MacGregor, who also works as an assistant at the Center for Astrophysics and Space Astronomy (Casa) and Department of Astrophysical and Planetary Sciences (APS).
She noted the debris disk wasn't just a collection of dust and rocks floating in space, but rather a historical record of the beginnings of planetary formation, providing a window into how Earth itself may have evolved over time.