MACS J0717 galaxy cluster [1280 x 1280]
![MACS J0717 galaxy cluster [1280 x 1280]](https://64.media.tumblr.com/6953ac2b8a34c4351a1757465e12856f/tumblr_o8tp3prhwl1s64f72o1_1280.jpg "MACS J0717 galaxy cluster [1280 x 1280]")
MACS J0717 galaxy cluster [1280 x 1280] -- source link
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