Arc in infrared light (Spitzer)
The distant galaxy, dubbed A1689-zD1, appears as a whitish blob at the centre of this close-up view obtained with the Spitzer’s Infrared Array Camera (IRAC). The galaxy is brimming with star birth. Hubble and Spitzer worked together to show that it is one of the youngest and likely the most distant galaxies ever discovered. Astronomers estimate that the galaxy is 13 thousand million light-years away.
The cluster of galaxies Abell 1689 is 2200 million light-years away and its combined mass acts as a gravitational lens, bending and magnifying the light of the galaxies located far behind it. The faraway galaxies appear as arc-shaped objects around the cluster. The increased magnification allows astronomers to study remote galaxies in greater detail.