Piotr Piasecki
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Enceladus, Saturn's tiny moon (310mi dia) churns with internal heat,ejecting plumes of microscopic ice particles into Saturn's orbit. Photo from the Cassini orbiter in 10/08, NASA. #Enceladus #Saturn #Astronomy #NASA #Cassini_Orbiter

Enceladus, Saturn's tiny moon (310mi dia) churns with internal heat,ejecting plumes of microscopic ice particles into Saturn's orbit. Photo from the Cassini orbiter in 10/08, NASA. #Enceladus #Saturn #Astronomy #NASA #Cassini_Orbiter

The Mars Express orbiter captured this stunning view of the north polar region of Mars /by ESA/DLR/FU Berlin (G. Neukum)

The Mars Express orbiter captured this stunning view of the north polar region of Mars /by ESA/DLR/FU Berlin (G. Neukum)

Scientists have discovered an invisible shield roughly 7,200 miles above earth. #mywatergallery

Scientists have discovered an invisible shield roughly 7,200 miles above earth. #mywatergallery

NASA Image of the Day | NASA Looks like an Owl

NASA Image of the Day | NASA Looks like an Owl

Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes!

Astronomers have discovered the largest known structure in the universe, a clump of active galactic cores that stretch 4 billion light-years from end to end. The structure is a light quasar group (LQG), a collection of extremely luminous Galactic Nulcei powered by supermassive central black holes!

See Explanation.  Clicking on the picture will download  the highest resolution version available.

See Explanation. Clicking on the picture will download the highest resolution version available.

Curiosity's panoramic view of Mars

Curiosity's panoramic view of Mars

Pluto in Enhanced Color

Pluto in Enhanced Color

Saturn eclipsing the sun

Saturn eclipsing the sun

Earth at night

Earth at night