An artist's impression of a quasar, a galaxy the bright center of a galaxy that radiates more light than all the stars in the galaxy combined. Scientists recently used light from quasars to hunt for a theoretical characteristic of the universe called quantum foam.

An artist's impression of a quasar, a galaxy the bright center of a galaxy that radiates more light than all the stars in the galaxy combined. Scientists recently used light from quasars to hunt for a theoretical characteristic of the universe called quantum foam.

The hand might look like an X-ray from the doctor's office, but it is actually a cloud of material ejected from a star that exploded. NASA's NuSTAR spacecraft has imaged the structure in high-energy X-rays for the first time, shown in blue. Lower-energy X-ray light previously detected by NASA's Chandra X-ray Observatory is shown in green and red. [Read the Full Story Behind the Image]

The hand might look like an X-ray from the doctor's office, but it is actually a cloud of material ejected from a star that exploded. NASA's NuSTAR spacecraft has imaged the structure in high-energy X-rays for the first time, shown in blue. Lower-energy X-ray light previously detected by NASA's Chandra X-ray Observatory is shown in green and red. [Read the Full Story Behind the Image]

The farthest confirmed galaxy to date, EGS-zs8-1, imaged here by the Hubble Space Telescope. New measurements taken at the W. M. Keck Observatory show that the galaxy lies about 13.1 billion light years from Earth.

The farthest confirmed galaxy to date, EGS-zs8-1, imaged here by the Hubble Space Telescope. New measurements taken at the W. M. Keck Observatory show that the galaxy lies about 13.1 billion light years from Earth.

A stunning image of the star cluster Westerlund 2 and gas cloud Gum 29 was chose as the official photo for the Hubble telescope's 25th birthday.<br />

A stunning image of the star cluster Westerlund 2 and gas cloud Gum 29 was chose as the official photo for the Hubble telescope's 25th birthday.<br />

Night sky photographer Amit Ashok Kamble captured this amazing panorama of the Milky Way over Pakiri Beach, New Zealand by stitching 10 images together into a complete mosaic. Image submitted May 5, 2014. [Read the Full Story Here]

Night sky photographer Amit Ashok Kamble captured this amazing panorama of the Milky Way over Pakiri Beach, New Zealand by stitching 10 images together into a complete mosaic. Image submitted May 5, 2014. [Read the Full Story Here]

NASA's Spitzer Space Telescope co-discovered an exoplanet more than 13,000 light-years from Earth, far from where most known exoplanets are.

NASA's Spitzer Space Telescope co-discovered an exoplanet more than 13,000 light-years from Earth, far from where most known exoplanets are.

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