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Solar System
Proteus is the second largest moon of Neptune behind the mysterious Triton. Proteus was discovered only in 1989 by the Voyager 2...
Solar System
This giant mosaic reveals Saturn's icy moon Rhea in her full, crater-scarred glory. This view consists of 21 clear-filter images and is...
Solar System
Venus
Solar System
The bubble-like heliosphere with its various transitional regions moving through the interstellar medium
Solar System
All planets of the Solar System lie very close to the ecliptic. The closer they are to the Sun, the faster they travel (inner planets on...
Black Hole
Blurring of X-rays near black hole (NuSTAR; 12 August 2014)
Black Hole
Inside of the event horizon, all paths bring the particle closer to the center of the black hole. It is no longer possible for the...
Comet
NASA is developing a comet harpoon for returning samples to Earth
Australia
Comet C/2006 P1 (McNaught) taken from Victoria, Australia 2007
Comet
Orbits of Comet Kohoutek (red) and Earth (blue), illustrating the high eccentricity of its orbit and its rapid motion when close to the Sun.
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