Expedition 21 Change of Command Ceremony; Atlantis to Undock Wednesday

STS-129 image. Image credit: NASA

Atlantis and crew are set to undock early Wednesday after three spacewalks to upgrade the International Space Station.
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Cassini Captures Ghostly Dance of Saturn's Northern Lights

Still frame of Saturn aurora

In the first video showing the auroras above the northern latitudes of Saturn, Cassini has spotted the tallest known 'northern lights' in the solar system, flickering in shape and brightness high above the ringed planet. › Learn More | › Video

 

The Crab Nebula: A Cosmic Icon

Chandra Image of the Crab Nebule. Image Credit: X-ray: NASA/CXC/SAO/F.Seward; Optical: NASA/ESA/ASU/J.Hester & A.Loll; Infrared: NASA/JPL-Caltech/Univ. Minn./R.Gehrz

A star's death was observed on Earth as the supernova of 1054 A.D. Almost a thousand years later, a neutron star left behind by the explosion spews out high-energy particles into the expanding debris field known as the Crab Nebula. › Read More

 

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