(click on images to enlarge)
From NASA/ ESA, January 31, 2019: This image, taken with Hubble’s Advanced Camera for Surveys shows a part the globular cluster NGC 6752. Behind the bright stars of the cluster a denser collection of faint stars is visible — a previously unknown dwarf spheroidal galaxy. This galaxy, nicknamed Bedin 1, is about 30 million light-years from Earth.
Credit: ESA/Hubble, NASA, Bedin et al.
Let's zoom out to see this galactic needle's place in a galactic haystack:
From NASA/ ESA: This composite image shows the location of the accidentally discovered dwarf galaxy Bedin 1 behind the globular cluster NGC 6752. The lower image, depicting the complete cluster, is a ground-based observation from the Digitized Sky Survey 2. The upper right image shows the full field of view of the NASA/ESA Hubble Space Telescope. The upper left one highlights the part containing the galaxy Bedin 1.
Credit: ESA/Hubble, NASA, Bedin et al., Digitized Sky Survey 2
How could they have missed it before? It's only 30 million light years from here.
