ALMA image and motion of the cold gas in REBELS-25 (side-by-side)

This image of the galaxy REBELS-25 was taken by the Atacama Large Millimeter/submillimeter Array (ALMA), an international facility co-owned by ESO. The left panel shows how cold gas is distributed in the galaxy, and exhibits hints of an elongated bar structure at its centre. The right panel shows the motion of cold gas in the galaxy. Blue colouring indicates movement towards Earth and red indicates movement away from Earth, with a darker shade representing faster movement. In this case, the red-blue divide of the image shows clearly that the object is rotating, making REBELS-25 the most distant rotating disc galaxy ever discovered.