Future Moon?

Images of PDS 70 show a disk of material that could be forming a moon around one of the star system's two known planets. The planet is the bright dot to the right of center in the image at left. The close-up frame, right, shows the glow of wisps of dust around the planet, which could coalesce to form a moon. The planet and disk span a width equal to the distance between Earth and the Sun. The star is encircled by a wider disk of gas and dust. The known planets carved a gap in the disk as they gobbled up the material. This is the first image that hints at the existence of a moon (current or future) around any planet other than those of our own solar system. The images were acquired by the Atacama Large Millimeter/submilliter Array in Chile. [ALMA (ESO/NAOJ/NRAO)/Benisty et al.]