Astronomers using the Gran Telescopio Canarias have spotted a low-mass planet-like object in a disk of gas and debris around SDSS J122859.93+104032.9, a white dwarf star located approximately 410 light-years away. The researchers speculate that it may be the leftover core of a planet whose outer layers have been removed. A planet-like object orbits SDSS J122859.93+104032.9, leaving a tail of gas in its wake. Image credit: Mark Garlick / University...
