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A partial map of the distribution of galaxies in the Sloan Digital Sky Survey, going out to a distance of 7 billion light years. The amount of galaxy clustering that we observe today is a signature of how gravity acted over cosmic time, and allows as to test whether general relativity holds over these scales. (c) M. Blanton, Sloan Digital Sky Survey
This artist's illustration shows the likely interior structure of Saturn's moon Titan deduced from gravity field data collected by NASA's Cassini spacecraft. The investigation by Cassini's radio science team suggests that Titan's interior is a cool mix of ice studded with rock, though the outermost 500 kilometers (300 miles) appear to be ice essentially devoid of any rock. Many planets and moons, including the Earth, evolve into a body with a clearly distinct rocky core. This radio science investigation suggests Titan's interior, cool and sluggish, failed to allow the interior to separate into completely differentiated layers of ice and rock.
In contrast to optical cameras, radar does not ‘see’ surfaces. Instead, it is much more aware of the edges and corners which bounce back the microwave signal it transmits.

General Relativiy Confirmed

Cassini Shows Off

International Space Station

Dark Matter is Mater of Fact

Ice and Rock Mixture Inside Titan

Radar Image Of The ISS

A new study validates general relativity on cosmic scale and the existence on dark matter. The analysis of more than 70,000 galaxies by UC Berkeley, University of Zurich and Princeton University physicists demonstrates that the universe – at least up to...
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By precisely tracking NASA's Cassini spacecraft on its low swoops over Saturn's moon Titan, scientists have determined the distribution of materials in the moon's interior. The subtle gravitational tugs they measured suggest the interior has been too...
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A while back the International Space Station (ISS) passed across the field-of-view of Germany's remote sensing satellite, TerraSAR-X, at a distance of 122 miles and at a relative speed of 34,540 over 22,000 mph. The encounter lasted for about three...
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