NASA has released an image of a newly discovered galaxy that is the youngest object seen so far. The young dwarf galaxy, named MACS0647-JD, is only 600 light-years across and is seen only 420 million years after the Big Bang (13.3 Billion light-years away from Earth).
The galaxy is tiny. For comparison, the Large Magellanic Cloud, a dwarf galaxy companion to the Milky Way, is 14,000 light-years wide. Our Milky Way is 150,000 light-years across.
The image above is a composite taken with Hubble’s Wide Field Camera 3 (WFC 3) and the Advanced Camera for Surveys ( ACS) on 5 October and 29 November 2011. The work was done by the Cluster Lensing And Supernova Survey with Hubble (CLASH) team.