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An image of the cosmic microwave background radiation, taken by the European Space Agency (ESA)'s Planck satellite in 2013, shows the small variations across the sky.

One of the largest galaxy clusters ever seen shines bright in this image from the Hubble Space Telescope. Called RX J1347.5-1145, this cluster lies 5 billion light-years from Earth.

These are some of the first images from the James Webb Space Telescope, released in a NASA news briefing on July 12.