One hundred fifty million light years away, spiral galaxy NGC 976 slowly spins in space, presenting a near face-on view of its tightly-wound arms as seen from Earth. Despite its tranquil appearance, NGC 976 has hosted supernova blasts that have helped astronomers more precisely measure the distances to this and other galaxies by calibrating the brightness of both type 1a supernovae and pulsating Cepheid variable stars. This spectacular image was captured by the Wide Field Camera 3 aboard the Hubble Space Telescope. Click on the image for a larger view.
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Galaxies like grains of sand, courtesy of Planck
The Hubble Space Telescope imaged a distant cluster of galaxies that was found by ESA’s Planck satellite, which detected distortions in the cosmic background radiation caused by the cluster’s gravity. Some five billion light years from Earth, the cluster’s members appear as a swarm of red-shifted galaxies, along with an arc of bluish light caused by gravitational lensing.